diff --git a/server/controllers/LibraryItemController.js b/server/controllers/LibraryItemController.js
index 17c7be8387..f08a60115b 100644
--- a/server/controllers/LibraryItemController.js
+++ b/server/controllers/LibraryItemController.js
@@ -24,6 +24,16 @@ const ShareManager = require('../managers/ShareManager')
  * @property {import('../models/User')} user
  *
  * @typedef {Request & RequestUserObject} RequestWithUser
+ *
+ * @typedef RequestEntityObject
+ * @property {import('../models/LibraryItem')} libraryItem
+ *
+ * @typedef {RequestWithUser & RequestEntityObject} LibraryItemControllerRequest
+ *
+ * @typedef RequestLibraryFileObject
+ * @property {import('../objects/files/LibraryFile')} libraryFile
+ *
+ * @typedef {RequestWithUser & RequestEntityObject & RequestLibraryFileObject} LibraryItemControllerRequestWithFile
  */
 
 class LibraryItemController {
@@ -35,17 +45,17 @@ class LibraryItemController {
    * ?include=progress,rssfeed,downloads,share
    * ?expanded=1
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   async findOne(req, res) {
     const includeEntities = (req.query.include || '').split(',')
     if (req.query.expanded == 1) {
-      var item = req.libraryItem.toJSONExpanded()
+      const item = req.libraryItem.toOldJSONExpanded()
 
       // Include users media progress
       if (includeEntities.includes('progress')) {
-        var episodeId = req.query.episode || null
+        const episodeId = req.query.episode || null
         item.userMediaProgress = req.user.getOldMediaProgress(item.id, episodeId)
       }
 
@@ -68,28 +78,32 @@ class LibraryItemController {
 
       return res.json(item)
     }
-    res.json(req.libraryItem)
+    res.json(req.libraryItem.toOldJSON())
   }
 
   /**
+   * PATCH: /api/items/:id
    *
-   * @param {RequestWithUser} req
+   * @deprecated
+   * Use the updateMedia /api/items/:id/media endpoint instead or updateCover /api/items/:id/cover
+   *
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   async update(req, res) {
-    var libraryItem = req.libraryItem
     // Item has cover and update is removing cover so purge it from cache
-    if (libraryItem.media.coverPath && req.body.media && (req.body.media.coverPath === '' || req.body.media.coverPath === null)) {
-      await CacheManager.purgeCoverCache(libraryItem.id)
+    if (req.libraryItem.media.coverPath && req.body.media && (req.body.media.coverPath === '' || req.body.media.coverPath === null)) {
+      await CacheManager.purgeCoverCache(req.libraryItem.id)
     }
 
-    const hasUpdates = libraryItem.update(req.body)
+    const oldLibraryItem = Database.libraryItemModel.getOldLibraryItem(req.libraryItem)
+    const hasUpdates = oldLibraryItem.update(req.body)
     if (hasUpdates) {
       Logger.debug(`[LibraryItemController] Updated now saving`)
-      await Database.updateLibraryItem(libraryItem)
-      SocketAuthority.emitter('item_updated', libraryItem.toJSONExpanded())
+      await Database.updateLibraryItem(oldLibraryItem)
+      SocketAuthority.emitter('item_updated', oldLibraryItem.toJSONExpanded())
     }
-    res.json(libraryItem.toJSON())
+    res.json(oldLibraryItem.toJSON())
   }
 
   /**
@@ -100,7 +114,7 @@ class LibraryItemController {
    *
    * @this {import('../routers/ApiRouter')}
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   async delete(req, res) {
@@ -111,14 +125,14 @@ class LibraryItemController {
     const authorIds = []
     const seriesIds = []
     if (req.libraryItem.isPodcast) {
-      mediaItemIds.push(...req.libraryItem.media.episodes.map((ep) => ep.id))
+      mediaItemIds.push(...req.libraryItem.media.podcastEpisodes.map((ep) => ep.id))
     } else {
       mediaItemIds.push(req.libraryItem.media.id)
-      if (req.libraryItem.media.metadata.authors?.length) {
-        authorIds.push(...req.libraryItem.media.metadata.authors.map((au) => au.id))
+      if (req.libraryItem.media.authors?.length) {
+        authorIds.push(...req.libraryItem.media.authors.map((au) => au.id))
       }
-      if (req.libraryItem.media.metadata.series?.length) {
-        seriesIds.push(...req.libraryItem.media.metadata.series.map((se) => se.id))
+      if (req.libraryItem.media.series?.length) {
+        seriesIds.push(...req.libraryItem.media.series.map((se) => se.id))
       }
     }
 
@@ -155,7 +169,7 @@ class LibraryItemController {
    * GET: /api/items/:id/download
    * Download library item. Zip file if multiple files.
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   async download(req, res) {
@@ -164,7 +178,7 @@ class LibraryItemController {
       return res.sendStatus(403)
     }
     const libraryItemPath = req.libraryItem.path
-    const itemTitle = req.libraryItem.media.metadata.title
+    const itemTitle = req.libraryItem.media.title
 
     Logger.info(`[LibraryItemController] User "${req.user.username}" requested download for item "${itemTitle}" at "${libraryItemPath}"`)
 
@@ -194,11 +208,10 @@ class LibraryItemController {
    *
    * @this {import('../routers/ApiRouter')}
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   async updateMedia(req, res) {
-    const libraryItem = req.libraryItem
     const mediaPayload = req.body
 
     if (mediaPayload.url) {
@@ -207,44 +220,41 @@ class LibraryItemController {
     }
 
     // Book specific
-    if (libraryItem.isBook) {
-      await this.createAuthorsAndSeriesForItemUpdate(mediaPayload, libraryItem.libraryId)
+    if (req.libraryItem.isBook) {
+      await this.createAuthorsAndSeriesForItemUpdate(mediaPayload, req.libraryItem.libraryId)
     }
 
     // Podcast specific
     let isPodcastAutoDownloadUpdated = false
-    if (libraryItem.isPodcast) {
-      if (mediaPayload.autoDownloadEpisodes !== undefined && libraryItem.media.autoDownloadEpisodes !== mediaPayload.autoDownloadEpisodes) {
+    if (req.libraryItem.isPodcast) {
+      if (mediaPayload.autoDownloadEpisodes !== undefined && req.libraryItem.media.autoDownloadEpisodes !== mediaPayload.autoDownloadEpisodes) {
         isPodcastAutoDownloadUpdated = true
-      } else if (mediaPayload.autoDownloadSchedule !== undefined && libraryItem.media.autoDownloadSchedule !== mediaPayload.autoDownloadSchedule) {
+      } else if (mediaPayload.autoDownloadSchedule !== undefined && req.libraryItem.media.autoDownloadSchedule !== mediaPayload.autoDownloadSchedule) {
         isPodcastAutoDownloadUpdated = true
       }
     }
 
     // Book specific - Get all series being removed from this item
     let seriesRemoved = []
-    if (libraryItem.isBook && mediaPayload.metadata?.series) {
+    if (req.libraryItem.isBook && mediaPayload.metadata?.series) {
       const seriesIdsInUpdate = mediaPayload.metadata.series?.map((se) => se.id) || []
-      seriesRemoved = libraryItem.media.metadata.series.filter((se) => !seriesIdsInUpdate.includes(se.id))
+      seriesRemoved = req.libraryItem.media.series.filter((se) => !seriesIdsInUpdate.includes(se.id))
     }
 
     let authorsRemoved = []
-    if (libraryItem.isBook && mediaPayload.metadata?.authors) {
+    if (req.libraryItem.isBook && mediaPayload.metadata?.authors) {
       const authorIdsInUpdate = mediaPayload.metadata.authors.map((au) => au.id)
-      authorsRemoved = libraryItem.media.metadata.authors.filter((au) => !authorIdsInUpdate.includes(au.id))
+      authorsRemoved = req.libraryItem.media.authors.filter((au) => !authorIdsInUpdate.includes(au.id))
     }
 
-    const hasUpdates = libraryItem.media.update(mediaPayload) || mediaPayload.url
+    const hasUpdates = (await req.libraryItem.media.updateFromRequest(mediaPayload)) || mediaPayload.url
     if (hasUpdates) {
-      libraryItem.updatedAt = Date.now()
-
       if (isPodcastAutoDownloadUpdated) {
-        this.cronManager.checkUpdatePodcastCron(libraryItem)
+        this.cronManager.checkUpdatePodcastCron(req.libraryItem)
       }
 
-      Logger.debug(`[LibraryItemController] Updated library item media ${libraryItem.media.metadata.title}`)
-      await Database.updateLibraryItem(libraryItem)
-      SocketAuthority.emitter('item_updated', libraryItem.toJSONExpanded())
+      Logger.debug(`[LibraryItemController] Updated library item media ${req.libraryItem.media.title}`)
+      SocketAuthority.emitter('item_updated', req.libraryItem.toOldJSONExpanded())
 
       if (authorsRemoved.length) {
         // Check remove empty authors
@@ -259,14 +269,14 @@ class LibraryItemController {
     }
     res.json({
       updated: hasUpdates,
-      libraryItem
+      libraryItem: req.libraryItem.toOldJSON()
     })
   }
 
   /**
    * POST: /api/items/:id/cover
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    * @param {boolean} [updateAndReturnJson=true]
    */
@@ -276,15 +286,13 @@ class LibraryItemController {
       return res.sendStatus(403)
     }
 
-    let libraryItem = req.libraryItem
-
     let result = null
     if (req.body?.url) {
       Logger.debug(`[LibraryItemController] Requesting download cover from url "${req.body.url}"`)
-      result = await CoverManager.downloadCoverFromUrl(libraryItem, req.body.url)
+      result = await CoverManager.downloadCoverFromUrlNew(req.body.url, req.libraryItem.id, req.libraryItem.isFile ? null : req.libraryItem.path)
     } else if (req.files?.cover) {
       Logger.debug(`[LibraryItemController] Handling uploaded cover`)
-      result = await CoverManager.uploadCover(libraryItem, req.files.cover)
+      result = await CoverManager.uploadCover(req.libraryItem, req.files.cover)
     } else {
       return res.status(400).send('Invalid request no file or url')
     }
@@ -296,8 +304,15 @@ class LibraryItemController {
     }
 
     if (updateAndReturnJson) {
-      await Database.updateLibraryItem(libraryItem)
-      SocketAuthority.emitter('item_updated', libraryItem.toJSONExpanded())
+      req.libraryItem.media.coverPath = result.cover
+      req.libraryItem.media.changed('coverPath', true)
+      await req.libraryItem.media.save()
+
+      // client uses updatedAt timestamp in URL to force refresh cover
+      req.libraryItem.changed('updatedAt', true)
+      await req.libraryItem.save()
+
+      SocketAuthority.emitter('item_updated', req.libraryItem.toOldJSONExpanded())
       res.json({
         success: true,
         cover: result.cover
@@ -308,22 +323,28 @@ class LibraryItemController {
   /**
    * PATCH: /api/items/:id/cover
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   async updateCover(req, res) {
-    const libraryItem = req.libraryItem
     if (!req.body.cover) {
       return res.status(400).send('Invalid request no cover path')
     }
 
-    const validationResult = await CoverManager.validateCoverPath(req.body.cover, libraryItem)
+    const validationResult = await CoverManager.validateCoverPath(req.body.cover, req.libraryItem)
     if (validationResult.error) {
       return res.status(500).send(validationResult.error)
     }
     if (validationResult.updated) {
-      await Database.updateLibraryItem(libraryItem)
-      SocketAuthority.emitter('item_updated', libraryItem.toJSONExpanded())
+      req.libraryItem.media.coverPath = validationResult.cover
+      req.libraryItem.media.changed('coverPath', true)
+      await req.libraryItem.media.save()
+
+      // client uses updatedAt timestamp in URL to force refresh cover
+      req.libraryItem.changed('updatedAt', true)
+      await req.libraryItem.save()
+
+      SocketAuthority.emitter('item_updated', req.libraryItem.toOldJSONExpanded())
     }
     res.json({
       success: true,
@@ -334,17 +355,22 @@ class LibraryItemController {
   /**
    * DELETE: /api/items/:id/cover
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   async removeCover(req, res) {
-    var libraryItem = req.libraryItem
+    if (req.libraryItem.media.coverPath) {
+      req.libraryItem.media.coverPath = null
+      req.libraryItem.media.changed('coverPath', true)
+      await req.libraryItem.media.save()
 
-    if (libraryItem.media.coverPath) {
-      libraryItem.updateMediaCover('')
-      await CacheManager.purgeCoverCache(libraryItem.id)
-      await Database.updateLibraryItem(libraryItem)
-      SocketAuthority.emitter('item_updated', libraryItem.toJSONExpanded())
+      // client uses updatedAt timestamp in URL to force refresh cover
+      req.libraryItem.changed('updatedAt', true)
+      await req.libraryItem.save()
+
+      await CacheManager.purgeCoverCache(req.libraryItem.id)
+
+      SocketAuthority.emitter('item_updated', req.libraryItem.toOldJSONExpanded())
     }
 
     res.sendStatus(200)
@@ -353,7 +379,7 @@ class LibraryItemController {
   /**
    * GET: /api/items/:id/cover
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   async getCover(req, res) {
@@ -395,11 +421,11 @@ class LibraryItemController {
    *
    * @this {import('../routers/ApiRouter')}
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   startPlaybackSession(req, res) {
-    if (!req.libraryItem.media.numTracks) {
+    if (!req.libraryItem.hasAudioTracks) {
       Logger.error(`[LibraryItemController] startPlaybackSession cannot playback ${req.libraryItem.id}`)
       return res.sendStatus(404)
     }
@@ -412,18 +438,18 @@ class LibraryItemController {
    *
    * @this {import('../routers/ApiRouter')}
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   startEpisodePlaybackSession(req, res) {
-    var libraryItem = req.libraryItem
-    if (!libraryItem.media.numTracks) {
-      Logger.error(`[LibraryItemController] startPlaybackSession cannot playback ${libraryItem.id}`)
-      return res.sendStatus(404)
+    if (!req.libraryItem.isPodcast) {
+      Logger.error(`[LibraryItemController] startEpisodePlaybackSession invalid media type ${req.libraryItem.id}`)
+      return res.sendStatus(400)
     }
-    var episodeId = req.params.episodeId
-    if (!libraryItem.media.episodes.find((ep) => ep.id === episodeId)) {
-      Logger.error(`[LibraryItemController] startPlaybackSession episode ${episodeId} not found for item ${libraryItem.id}`)
+
+    const episodeId = req.params.episodeId
+    if (!req.libraryItem.media.podcastEpisodes.some((ep) => ep.id === episodeId)) {
+      Logger.error(`[LibraryItemController] startPlaybackSession episode ${episodeId} not found for item ${req.libraryItem.id}`)
       return res.sendStatus(404)
     }
 
@@ -433,30 +459,55 @@ class LibraryItemController {
   /**
    * PATCH: /api/items/:id/tracks
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   async updateTracks(req, res) {
-    var libraryItem = req.libraryItem
-    var orderedFileData = req.body.orderedFileData
-    if (!libraryItem.media.updateAudioTracks) {
-      Logger.error(`[LibraryItemController] updateTracks invalid media type ${libraryItem.id}`)
-      return res.sendStatus(500)
+    const orderedFileData = req.body?.orderedFileData
+
+    if (!req.libraryItem.isBook) {
+      Logger.error(`[LibraryItemController] updateTracks invalid media type ${req.libraryItem.id}`)
+      return res.sendStatus(400)
+    }
+    if (!Array.isArray(orderedFileData) || !orderedFileData.length) {
+      Logger.error(`[LibraryItemController] updateTracks invalid orderedFileData ${req.libraryItem.id}`)
+      return res.sendStatus(400)
+    }
+    // Ensure that each orderedFileData has a valid ino and is in the book audioFiles
+    if (orderedFileData.some((fileData) => !fileData?.ino || !req.libraryItem.media.audioFiles.some((af) => af.ino === fileData.ino))) {
+      Logger.error(`[LibraryItemController] updateTracks invalid orderedFileData ${req.libraryItem.id}`)
+      return res.sendStatus(400)
     }
-    libraryItem.media.updateAudioTracks(orderedFileData)
-    await Database.updateLibraryItem(libraryItem)
-    SocketAuthority.emitter('item_updated', libraryItem.toJSONExpanded())
-    res.json(libraryItem.toJSON())
+
+    let index = 1
+    const updatedAudioFiles = orderedFileData.map((fileData) => {
+      const audioFile = req.libraryItem.media.audioFiles.find((af) => af.ino === fileData.ino)
+      audioFile.manuallyVerified = true
+      audioFile.exclude = !!fileData.exclude
+      if (audioFile.exclude) {
+        audioFile.index = -1
+      } else {
+        audioFile.index = index++
+      }
+      return audioFile
+    })
+    updatedAudioFiles.sort((a, b) => a.index - b.index)
+
+    req.libraryItem.media.audioFiles = updatedAudioFiles
+    req.libraryItem.media.changed('audioFiles', true)
+    await req.libraryItem.media.save()
+
+    SocketAuthority.emitter('item_updated', req.libraryItem.toOldJSONExpanded())
+    res.json(req.libraryItem.toOldJSON())
   }
 
   /**
    * POST /api/items/:id/match
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   async match(req, res) {
-    const libraryItem = req.libraryItem
     const reqBody = req.body || {}
 
     const options = {}
@@ -473,7 +524,8 @@ class LibraryItemController {
       options.overrideDetails = !!reqBody.overrideDetails
     }
 
-    var matchResult = await Scanner.quickMatchLibraryItem(this, libraryItem, options)
+    const oldLibraryItem = Database.libraryItemModel.getOldLibraryItem(req.libraryItem)
+    var matchResult = await Scanner.quickMatchLibraryItem(this, oldLibraryItem, options)
     res.json(matchResult)
   }
 
@@ -741,7 +793,7 @@ class LibraryItemController {
   /**
    * POST: /api/items/:id/scan
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   async scan(req, res) {
@@ -765,7 +817,7 @@ class LibraryItemController {
   /**
    * GET: /api/items/:id/metadata-object
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   getMetadataObject(req, res) {
@@ -774,7 +826,7 @@ class LibraryItemController {
       return res.sendStatus(403)
     }
 
-    if (req.libraryItem.isMissing || !req.libraryItem.hasAudioFiles || !req.libraryItem.isBook) {
+    if (req.libraryItem.isMissing || !req.libraryItem.isBook || !req.libraryItem.media.includedAudioFiles.length) {
       Logger.error(`[LibraryItemController] Invalid library item`)
       return res.sendStatus(500)
     }
@@ -785,7 +837,7 @@ class LibraryItemController {
   /**
    * POST: /api/items/:id/chapters
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   async updateMediaChapters(req, res) {
@@ -794,26 +846,51 @@ class LibraryItemController {
       return res.sendStatus(403)
     }
 
-    if (req.libraryItem.isMissing || !req.libraryItem.hasAudioFiles || !req.libraryItem.isBook) {
+    if (req.libraryItem.isMissing || !req.libraryItem.isBook || !req.libraryItem.media.hasAudioTracks) {
       Logger.error(`[LibraryItemController] Invalid library item`)
       return res.sendStatus(500)
     }
 
-    if (!req.body.chapters) {
+    if (!Array.isArray(req.body.chapters) || req.body.chapters.some((c) => !c.title || typeof c.title !== 'string' || c.start === undefined || typeof c.start !== 'number' || c.end === undefined || typeof c.end !== 'number')) {
       Logger.error(`[LibraryItemController] Invalid payload`)
       return res.sendStatus(400)
     }
 
     const chapters = req.body.chapters || []
-    const wasUpdated = req.libraryItem.media.updateChapters(chapters)
-    if (wasUpdated) {
-      await Database.updateLibraryItem(req.libraryItem)
-      SocketAuthority.emitter('item_updated', req.libraryItem.toJSONExpanded())
+
+    let hasUpdates = false
+    if (chapters.length !== req.libraryItem.media.chapters.length) {
+      req.libraryItem.media.chapters = chapters.map((c, index) => {
+        return {
+          id: index,
+          title: c.title,
+          start: c.start,
+          end: c.end
+        }
+      })
+      hasUpdates = true
+    } else {
+      for (const [index, chapter] of chapters.entries()) {
+        const currentChapter = req.libraryItem.media.chapters[index]
+        if (currentChapter.title !== chapter.title || currentChapter.start !== chapter.start || currentChapter.end !== chapter.end) {
+          currentChapter.title = chapter.title
+          currentChapter.start = chapter.start
+          currentChapter.end = chapter.end
+          hasUpdates = true
+        }
+      }
+    }
+
+    if (hasUpdates) {
+      req.libraryItem.media.changed('chapters', true)
+      await req.libraryItem.media.save()
+
+      SocketAuthority.emitter('item_updated', req.libraryItem.toOldJSONExpanded())
     }
 
     res.json({
       success: true,
-      updated: wasUpdated
+      updated: hasUpdates
     })
   }
 
@@ -821,7 +898,7 @@ class LibraryItemController {
    * GET: /api/items/:id/ffprobe/:fileid
    * FFProbe JSON result from audio file
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   async getFFprobeData(req, res) {
@@ -829,25 +906,21 @@ class LibraryItemController {
       Logger.error(`[LibraryItemController] Non-admin user "${req.user.username}" attempted to get ffprobe data`)
       return res.sendStatus(403)
     }
-    if (req.libraryFile.fileType !== 'audio') {
-      Logger.error(`[LibraryItemController] Invalid filetype "${req.libraryFile.fileType}" for fileid "${req.params.fileid}". Expected audio file`)
-      return res.sendStatus(400)
-    }
 
-    const audioFile = req.libraryItem.media.findFileWithInode(req.params.fileid)
+    const audioFile = req.libraryItem.getAudioFileWithIno(req.params.fileid)
     if (!audioFile) {
       Logger.error(`[LibraryItemController] Audio file not found with inode value ${req.params.fileid}`)
       return res.sendStatus(404)
     }
 
-    const ffprobeData = await AudioFileScanner.probeAudioFile(audioFile)
+    const ffprobeData = await AudioFileScanner.probeAudioFile(audioFile.metadata.path)
     res.json(ffprobeData)
   }
 
   /**
    * GET api/items/:id/file/:fileid
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequestWithFile} req
    * @param {Response} res
    */
   async getLibraryFile(req, res) {
@@ -870,7 +943,7 @@ class LibraryItemController {
   /**
    * DELETE api/items/:id/file/:fileid
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequestWithFile} req
    * @param {Response} res
    */
   async deleteLibraryFile(req, res) {
@@ -881,17 +954,35 @@ class LibraryItemController {
     await fs.remove(libraryFile.metadata.path).catch((error) => {
       Logger.error(`[LibraryItemController] Failed to delete library file at "${libraryFile.metadata.path}"`, error)
     })
-    req.libraryItem.removeLibraryFile(req.params.fileid)
 
-    if (req.libraryItem.media.removeFileWithInode(req.params.fileid)) {
-      // If book has no more media files then mark it as missing
-      if (req.libraryItem.mediaType === 'book' && !req.libraryItem.media.hasMediaEntities) {
-        req.libraryItem.setMissing()
+    req.libraryItem.libraryFiles = req.libraryItem.libraryFiles.filter((lf) => lf.ino !== req.params.fileid)
+    req.libraryItem.changed('libraryFiles', true)
+
+    if (req.libraryItem.isBook) {
+      if (req.libraryItem.media.audioFiles.some((af) => af.ino === req.params.fileid)) {
+        req.libraryItem.media.audioFiles = req.libraryItem.media.audioFiles.filter((af) => af.ino !== req.params.fileid)
+        req.libraryItem.media.changed('audioFiles', true)
+      } else if (req.libraryItem.media.ebookFile?.ino === req.params.fileid) {
+        req.libraryItem.media.ebookFile = null
+        req.libraryItem.media.changed('ebookFile', true)
       }
+      if (!req.libraryItem.media.hasMediaFiles) {
+        req.libraryItem.isMissing = true
+      }
+    } else if (req.libraryItem.media.podcastEpisodes.some((ep) => ep.audioFile.ino === req.params.fileid)) {
+      const episodeToRemove = req.libraryItem.media.podcastEpisodes.find((ep) => ep.audioFile.ino === req.params.fileid)
+      await episodeToRemove.destroy()
+
+      req.libraryItem.media.podcastEpisodes = req.libraryItem.media.podcastEpisodes.filter((ep) => ep.audioFile.ino !== req.params.fileid)
     }
-    req.libraryItem.updatedAt = Date.now()
-    await Database.updateLibraryItem(req.libraryItem)
-    SocketAuthority.emitter('item_updated', req.libraryItem.toJSONExpanded())
+
+    if (req.libraryItem.media.changed()) {
+      await req.libraryItem.media.save()
+    }
+
+    await req.libraryItem.save()
+
+    SocketAuthority.emitter('item_updated', req.libraryItem.toOldJSONExpanded())
     res.sendStatus(200)
   }
 
@@ -899,7 +990,7 @@ class LibraryItemController {
    * GET api/items/:id/file/:fileid/download
    * Same as GET api/items/:id/file/:fileid but allows logging and restricting downloads
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequestWithFile} req
    * @param {Response} res
    */
   async downloadLibraryFile(req, res) {
@@ -911,7 +1002,7 @@ class LibraryItemController {
       return res.sendStatus(403)
     }
 
-    Logger.info(`[LibraryItemController] User "${req.user.username}" requested download for item "${req.libraryItem.media.metadata.title}" file at "${libraryFile.metadata.path}"`)
+    Logger.info(`[LibraryItemController] User "${req.user.username}" requested download for item "${req.libraryItem.media.title}" file at "${libraryFile.metadata.path}"`)
 
     if (global.XAccel) {
       const encodedURI = encodeUriPath(global.XAccel + libraryFile.metadata.path)
@@ -947,13 +1038,13 @@ class LibraryItemController {
    * fileid is only required when reading a supplementary ebook
    * when no fileid is passed in the primary ebook will be returned
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequest} req
    * @param {Response} res
    */
   async getEBookFile(req, res) {
     let ebookFile = null
     if (req.params.fileid) {
-      ebookFile = req.libraryItem.libraryFiles.find((lf) => lf.ino === req.params.fileid)
+      ebookFile = req.libraryItem.getLibraryFileWithIno(req.params.fileid)
       if (!ebookFile?.isEBookFile) {
         Logger.error(`[LibraryItemController] Invalid ebook file id "${req.params.fileid}"`)
         return res.status(400).send('Invalid ebook file id')
@@ -963,12 +1054,12 @@ class LibraryItemController {
     }
 
     if (!ebookFile) {
-      Logger.error(`[LibraryItemController] No ebookFile for library item "${req.libraryItem.media.metadata.title}"`)
+      Logger.error(`[LibraryItemController] No ebookFile for library item "${req.libraryItem.media.title}"`)
       return res.sendStatus(404)
     }
     const ebookFilePath = ebookFile.metadata.path
 
-    Logger.info(`[LibraryItemController] User "${req.user.username}" requested download for item "${req.libraryItem.media.metadata.title}" ebook at "${ebookFilePath}"`)
+    Logger.info(`[LibraryItemController] User "${req.user.username}" requested download for item "${req.libraryItem.media.title}" ebook at "${ebookFilePath}"`)
 
     if (global.XAccel) {
       const encodedURI = encodeUriPath(global.XAccel + ebookFilePath)
@@ -991,28 +1082,55 @@ class LibraryItemController {
    * if an ebook file is the primary ebook, then it will be changed to supplementary
    * if an ebook file is supplementary, then it will be changed to primary
    *
-   * @param {RequestWithUser} req
+   * @param {LibraryItemControllerRequestWithFile} req
    * @param {Response} res
    */
   async updateEbookFileStatus(req, res) {
-    const ebookLibraryFile = req.libraryItem.libraryFiles.find((lf) => lf.ino === req.params.fileid)
-    if (!ebookLibraryFile?.isEBookFile) {
+    if (!req.libraryItem.isBook) {
+      Logger.error(`[LibraryItemController] Invalid media type for ebook file status update`)
+      return res.sendStatus(400)
+    }
+    if (!req.libraryFile?.isEBookFile) {
       Logger.error(`[LibraryItemController] Invalid ebook file id "${req.params.fileid}"`)
       return res.status(400).send('Invalid ebook file id')
     }
 
+    const ebookLibraryFile = req.libraryFile
+    let primaryEbookFile = null
+
+    const ebookLibraryFileInos = req.libraryItem
+      .getLibraryFiles()
+      .filter((lf) => lf.isEBookFile)
+      .map((lf) => lf.ino)
+
     if (ebookLibraryFile.isSupplementary) {
       Logger.info(`[LibraryItemController] Updating ebook file "${ebookLibraryFile.metadata.filename}" to primary`)
-      req.libraryItem.setPrimaryEbook(ebookLibraryFile)
+
+      primaryEbookFile = ebookLibraryFile.toJSON()
+      delete primaryEbookFile.isSupplementary
+      delete primaryEbookFile.fileType
+      primaryEbookFile.ebookFormat = ebookLibraryFile.metadata.format
     } else {
       Logger.info(`[LibraryItemController] Updating ebook file "${ebookLibraryFile.metadata.filename}" to supplementary`)
-      ebookLibraryFile.isSupplementary = true
-      req.libraryItem.setPrimaryEbook(null)
     }
 
-    req.libraryItem.updatedAt = Date.now()
-    await Database.updateLibraryItem(req.libraryItem)
-    SocketAuthority.emitter('item_updated', req.libraryItem.toJSONExpanded())
+    req.libraryItem.media.ebookFile = primaryEbookFile
+    req.libraryItem.media.changed('ebookFile', true)
+    await req.libraryItem.media.save()
+
+    req.libraryItem.libraryFiles = req.libraryItem.libraryFiles.map((lf) => {
+      if (ebookLibraryFileInos.includes(lf.ino)) {
+        lf.isSupplementary = lf.ino !== primaryEbookFile?.ino
+      }
+      return lf
+    })
+    req.libraryItem.changed('libraryFiles', true)
+
+    req.libraryItem.isMissing = !req.libraryItem.media.hasMediaFiles
+
+    await req.libraryItem.save()
+
+    SocketAuthority.emitter('item_updated', req.libraryItem.toOldJSONExpanded())
     res.sendStatus(200)
   }
 
@@ -1023,7 +1141,7 @@ class LibraryItemController {
    * @param {NextFunction} next
    */
   async middleware(req, res, next) {
-    req.libraryItem = await Database.libraryItemModel.getOldById(req.params.id)
+    req.libraryItem = await Database.libraryItemModel.getExpandedById(req.params.id)
     if (!req.libraryItem?.media) return res.sendStatus(404)
 
     // Check user can access this library item
@@ -1033,7 +1151,7 @@ class LibraryItemController {
 
     // For library file routes, get the library file
     if (req.params.fileid) {
-      req.libraryFile = req.libraryItem.libraryFiles.find((lf) => lf.ino === req.params.fileid)
+      req.libraryFile = req.libraryItem.getLibraryFileWithIno(req.params.fileid)
       if (!req.libraryFile) {
         Logger.error(`[LibraryItemController] Library file "${req.params.fileid}" does not exist for library item`)
         return res.sendStatus(404)
diff --git a/server/managers/AudioMetadataManager.js b/server/managers/AudioMetadataManager.js
index 7911178e34..36aecb97de 100644
--- a/server/managers/AudioMetadataManager.js
+++ b/server/managers/AudioMetadataManager.js
@@ -34,8 +34,13 @@ class AudioMetadataMangaer {
     return this.tasksQueued.some((t) => t.data.libraryItemId === libraryItemId) || this.tasksRunning.some((t) => t.data.libraryItemId === libraryItemId)
   }
 
+  /**
+   *
+   * @param {import('../models/LibraryItem')} libraryItem
+   * @returns
+   */
   getMetadataObjectForApi(libraryItem) {
-    return ffmpegHelpers.getFFMetadataObject(libraryItem, libraryItem.media.includedAudioFiles.length)
+    return ffmpegHelpers.getFFMetadataObject(libraryItem.toOldJSONExpanded(), libraryItem.media.includedAudioFiles.length)
   }
 
   /**
diff --git a/server/managers/CoverManager.js b/server/managers/CoverManager.js
index 2b3a697d75..c995a446d6 100644
--- a/server/managers/CoverManager.js
+++ b/server/managers/CoverManager.js
@@ -79,6 +79,12 @@ class CoverManager {
     return imgType
   }
 
+  /**
+   *
+   * @param {import('../models/LibraryItem')} libraryItem
+   * @param {*} coverFile - file object from req.files
+   * @returns {Promise<{error:string}|{cover:string}>}
+   */
   async uploadCover(libraryItem, coverFile) {
     const extname = Path.extname(coverFile.name.toLowerCase())
     if (!extname || !globals.SupportedImageTypes.includes(extname.slice(1))) {
@@ -110,14 +116,20 @@ class CoverManager {
     await this.removeOldCovers(coverDirPath, extname)
     await CacheManager.purgeCoverCache(libraryItem.id)
 
-    Logger.info(`[CoverManager] Uploaded libraryItem cover "${coverFullPath}" for "${libraryItem.media.metadata.title}"`)
+    Logger.info(`[CoverManager] Uploaded libraryItem cover "${coverFullPath}" for "${libraryItem.media.title}"`)
 
-    libraryItem.updateMediaCover(coverFullPath)
     return {
       cover: coverFullPath
     }
   }
 
+  /**
+   *
+   * @param {Object} libraryItem - old library item
+   * @param {string} url
+   * @param {boolean} [forceLibraryItemFolder=false]
+   * @returns {Promise<{error:string}|{cover:string}>}
+   */
   async downloadCoverFromUrl(libraryItem, url, forceLibraryItemFolder = false) {
     try {
       // Force save cover with library item is used for adding new podcasts
@@ -166,6 +178,12 @@ class CoverManager {
     }
   }
 
+  /**
+   *
+   * @param {string} coverPath
+   * @param {import('../models/LibraryItem')} libraryItem
+   * @returns {Promise<{error:string}|{cover:string,updated:boolean}>}
+   */
   async validateCoverPath(coverPath, libraryItem) {
     // Invalid cover path
     if (!coverPath || coverPath.startsWith('http:') || coverPath.startsWith('https:')) {
@@ -235,7 +253,6 @@ class CoverManager {
 
     await CacheManager.purgeCoverCache(libraryItem.id)
 
-    libraryItem.updateMediaCover(coverPath)
     return {
       cover: coverPath,
       updated: true
diff --git a/server/managers/CronManager.js b/server/managers/CronManager.js
index 7a8c9bd0e3..a4dbe6b456 100644
--- a/server/managers/CronManager.js
+++ b/server/managers/CronManager.js
@@ -215,6 +215,10 @@ class CronManager {
     this.podcastCrons = this.podcastCrons.filter((pc) => pc.expression !== podcastCron.expression)
   }
 
+  /**
+   *
+   * @param {import('../models/LibraryItem')} libraryItem - this can be the old model
+   */
   checkUpdatePodcastCron(libraryItem) {
     // Remove from old cron by library item id
     const existingCron = this.podcastCrons.find((pc) => pc.libraryItemIds.includes(libraryItem.id))
@@ -230,7 +234,10 @@ class CronManager {
       const cronMatchingExpression = this.podcastCrons.find((pc) => pc.expression === libraryItem.media.autoDownloadSchedule)
       if (cronMatchingExpression) {
         cronMatchingExpression.libraryItemIds.push(libraryItem.id)
-        Logger.info(`[CronManager] Added podcast "${libraryItem.media.metadata.title}" to auto dl episode cron "${cronMatchingExpression.expression}"`)
+
+        // TODO: Update after old model removed
+        const podcastTitle = libraryItem.media.title || libraryItem.media.metadata?.title
+        Logger.info(`[CronManager] Added podcast "${podcastTitle}" to auto dl episode cron "${cronMatchingExpression.expression}"`)
       } else {
         this.startPodcastCron(libraryItem.media.autoDownloadSchedule, [libraryItem.id])
       }
diff --git a/server/managers/PlaybackSessionManager.js b/server/managers/PlaybackSessionManager.js
index ce43fc8c41..aace3df7c3 100644
--- a/server/managers/PlaybackSessionManager.js
+++ b/server/managers/PlaybackSessionManager.js
@@ -39,7 +39,7 @@ class PlaybackSessionManager {
 
   /**
    *
-   * @param {import('../controllers/SessionController').RequestWithUser} req
+   * @param {import('../controllers/LibraryItemController').LibraryItemControllerRequest} req
    * @param {Object} [clientDeviceInfo]
    * @returns {Promise<DeviceInfo>}
    */
@@ -67,14 +67,14 @@ class PlaybackSessionManager {
 
   /**
    *
-   * @param {import('../controllers/SessionController').RequestWithUser} req
+   * @param {import('../controllers/LibraryItemController').LibraryItemControllerRequest} req
    * @param {import('express').Response} res
    * @param {string} [episodeId]
    */
   async startSessionRequest(req, res, episodeId) {
     const deviceInfo = await this.getDeviceInfo(req, req.body?.deviceInfo)
     Logger.debug(`[PlaybackSessionManager] startSessionRequest for device ${deviceInfo.deviceDescription}`)
-    const { libraryItem, body: options } = req
+    const { oldLibraryItem: libraryItem, body: options } = req
     const session = await this.startSession(req.user, deviceInfo, libraryItem, episodeId, options)
     res.json(session.toJSONForClient(libraryItem))
   }
diff --git a/server/models/Book.js b/server/models/Book.js
index a904f53693..756a9dea93 100644
--- a/server/models/Book.js
+++ b/server/models/Book.js
@@ -1,5 +1,7 @@
 const { DataTypes, Model } = require('sequelize')
 const Logger = require('../Logger')
+const { getTitlePrefixAtEnd, getTitleIgnorePrefix } = require('../utils')
+const parseNameString = require('../utils/parsers/parseNameString')
 
 /**
  * @typedef EBookFileObject
@@ -113,8 +115,12 @@ class Book extends Model {
     /** @type {Date} */
     this.createdAt
 
+    // Expanded properties
+
     /** @type {import('./Author')[]} - optional if expanded */
     this.authors
+    /** @type {import('./Series')[]} - optional if expanded */
+    this.series
   }
 
   static getOldBook(libraryItemExpanded) {
@@ -241,32 +247,6 @@ class Book extends Model {
     }
   }
 
-  getAbsMetadataJson() {
-    return {
-      tags: this.tags || [],
-      chapters: this.chapters?.map((c) => ({ ...c })) || [],
-      title: this.title,
-      subtitle: this.subtitle,
-      authors: this.authors.map((a) => a.name),
-      narrators: this.narrators,
-      series: this.series.map((se) => {
-        const sequence = se.bookSeries?.sequence || ''
-        if (!sequence) return se.name
-        return `${se.name} #${sequence}`
-      }),
-      genres: this.genres || [],
-      publishedYear: this.publishedYear,
-      publishedDate: this.publishedDate,
-      publisher: this.publisher,
-      description: this.description,
-      isbn: this.isbn,
-      asin: this.asin,
-      language: this.language,
-      explicit: !!this.explicit,
-      abridged: !!this.abridged
-    }
-  }
-
   /**
    * Initialize model
    * @param {import('../Database').sequelize} sequelize
@@ -343,9 +323,50 @@ class Book extends Model {
     }
     return this.authors.map((au) => au.name).join(', ')
   }
+
+  /**
+   * Comma separated array of author names in Last, First format
+   * Requires authors to be loaded
+   *
+   * @returns {string}
+   */
+  get authorNameLF() {
+    if (this.authors === undefined) {
+      Logger.error(`[Book] authorNameLF: Cannot get authorNameLF because authors are not loaded`)
+      return ''
+    }
+
+    // Last, First
+    if (!this.authors.length) return ''
+    return this.authors.map((au) => parseNameString.nameToLastFirst(au.name)).join(', ')
+  }
+
+  /**
+   * Comma separated array of series with sequence
+   * Requires series to be loaded
+   *
+   * @returns {string}
+   */
+  get seriesName() {
+    if (this.series === undefined) {
+      Logger.error(`[Book] seriesName: Cannot get seriesName because series are not loaded`)
+      return ''
+    }
+
+    if (!this.series.length) return ''
+    return this.series
+      .map((se) => {
+        const sequence = se.bookSeries?.sequence || ''
+        if (!sequence) return se.name
+        return `${se.name} #${sequence}`
+      })
+      .join(', ')
+  }
+
   get includedAudioFiles() {
     return this.audioFiles.filter((af) => !af.exclude)
   }
+
   get trackList() {
     let startOffset = 0
     return this.includedAudioFiles.map((af) => {
@@ -355,6 +376,299 @@ class Book extends Model {
       return track
     })
   }
+
+  get hasMediaFiles() {
+    return !!this.hasAudioTracks || !!this.ebookFile
+  }
+
+  get hasAudioTracks() {
+    return !!this.includedAudioFiles.length
+  }
+
+  /**
+   * Total file size of all audio files and ebook file
+   *
+   * @returns {number}
+   */
+  get size() {
+    let total = 0
+    this.audioFiles.forEach((af) => (total += af.metadata.size))
+    if (this.ebookFile) {
+      total += this.ebookFile.metadata.size
+    }
+    return total
+  }
+
+  getAbsMetadataJson() {
+    return {
+      tags: this.tags || [],
+      chapters: this.chapters?.map((c) => ({ ...c })) || [],
+      title: this.title,
+      subtitle: this.subtitle,
+      authors: this.authors.map((a) => a.name),
+      narrators: this.narrators,
+      series: this.series.map((se) => {
+        const sequence = se.bookSeries?.sequence || ''
+        if (!sequence) return se.name
+        return `${se.name} #${sequence}`
+      }),
+      genres: this.genres || [],
+      publishedYear: this.publishedYear,
+      publishedDate: this.publishedDate,
+      publisher: this.publisher,
+      description: this.description,
+      isbn: this.isbn,
+      asin: this.asin,
+      language: this.language,
+      explicit: !!this.explicit,
+      abridged: !!this.abridged
+    }
+  }
+
+  /**
+   *
+   * @param {Object} payload - old book object
+   * @returns {Promise<boolean>}
+   */
+  async updateFromRequest(payload) {
+    if (!payload) return false
+
+    let hasUpdates = false
+
+    if (payload.metadata) {
+      const metadataStringKeys = ['title', 'subtitle', 'publishedYear', 'publishedDate', 'publisher', 'description', 'isbn', 'asin', 'language']
+      metadataStringKeys.forEach((key) => {
+        if (typeof payload.metadata[key] === 'string' && this[key] !== payload.metadata[key]) {
+          this[key] = payload.metadata[key] || null
+
+          if (key === 'title') {
+            this.titleIgnorePrefix = getTitleIgnorePrefix(this.title)
+          }
+
+          hasUpdates = true
+        }
+      })
+      if (payload.metadata.explicit !== undefined && this.explicit !== !!payload.metadata.explicit) {
+        this.explicit = !!payload.metadata.explicit
+        hasUpdates = true
+      }
+      if (payload.metadata.abridged !== undefined && this.abridged !== !!payload.metadata.abridged) {
+        this.abridged = !!payload.metadata.abridged
+        hasUpdates = true
+      }
+      const arrayOfStringsKeys = ['narrators', 'genres']
+      arrayOfStringsKeys.forEach((key) => {
+        if (Array.isArray(payload.metadata[key]) && !payload.metadata[key].some((item) => typeof item !== 'string') && JSON.stringify(this[key]) !== JSON.stringify(payload.metadata[key])) {
+          this[key] = payload.metadata[key]
+          this.changed(key, true)
+          hasUpdates = true
+        }
+      })
+    }
+
+    if (Array.isArray(payload.tags) && !payload.tags.some((tag) => typeof tag !== 'string') && JSON.stringify(this.tags) !== JSON.stringify(payload.tags)) {
+      this.tags = payload.tags
+      this.changed('tags', true)
+      hasUpdates = true
+    }
+
+    // TODO: Remove support for updating audioFiles, chapters and ebookFile here
+    const arrayOfObjectsKeys = ['audioFiles', 'chapters']
+    arrayOfObjectsKeys.forEach((key) => {
+      if (Array.isArray(payload[key]) && !payload[key].some((item) => typeof item !== 'object') && JSON.stringify(this[key]) !== JSON.stringify(payload[key])) {
+        this[key] = payload[key]
+        this.changed(key, true)
+        hasUpdates = true
+      }
+    })
+    if (payload.ebookFile && JSON.stringify(this.ebookFile) !== JSON.stringify(payload.ebookFile)) {
+      this.ebookFile = payload.ebookFile
+      this.changed('ebookFile', true)
+      hasUpdates = true
+    }
+
+    if (hasUpdates) {
+      Logger.debug(`[Book] "${this.title}" changed keys:`, this.changed())
+      await this.save()
+    }
+
+    if (Array.isArray(payload.metadata?.authors)) {
+      const authorsRemoved = this.authors.filter((au) => !payload.metadata.authors.some((a) => a.id === au.id))
+      const newAuthors = payload.metadata.authors.filter((a) => !this.authors.some((au) => au.id === a.id))
+
+      for (const author of authorsRemoved) {
+        await this.sequelize.models.bookAuthor.removeByIds(author.id, this.id)
+        Logger.debug(`[Book] "${this.title}" Removed author ${author.id}`)
+        hasUpdates = true
+      }
+      for (const author of newAuthors) {
+        await this.sequelize.models.bookAuthor.create({ bookId: this.id, authorId: author.id })
+        Logger.debug(`[Book] "${this.title}" Added author ${author.id}`)
+        hasUpdates = true
+      }
+    }
+
+    if (Array.isArray(payload.metadata?.series)) {
+      const seriesRemoved = this.series.filter((se) => !payload.metadata.series.some((s) => s.id === se.id))
+      const newSeries = payload.metadata.series.filter((s) => !this.series.some((se) => se.id === s.id))
+
+      for (const series of seriesRemoved) {
+        await this.sequelize.models.bookSeries.removeByIds(series.id, this.id)
+        Logger.debug(`[Book] "${this.title}" Removed series ${series.id}`)
+        hasUpdates = true
+      }
+      for (const series of newSeries) {
+        await this.sequelize.models.bookSeries.create({ bookId: this.id, seriesId: series.id, sequence: series.sequence })
+        Logger.debug(`[Book] "${this.title}" Added series ${series.id}`)
+        hasUpdates = true
+      }
+      for (const series of payload.metadata.series) {
+        const existingSeries = this.series.find((se) => se.id === series.id)
+        if (existingSeries && existingSeries.bookSeries.sequence !== series.sequence) {
+          await existingSeries.bookSeries.update({ sequence: series.sequence })
+          Logger.debug(`[Book] "${this.title}" Updated series ${series.id} sequence ${series.sequence}`)
+          hasUpdates = true
+        }
+      }
+    }
+
+    return hasUpdates
+  }
+
+  /**
+   * Old model kept metadata in a separate object
+   */
+  oldMetadataToJSON() {
+    const authors = this.authors.map((au) => ({ id: au.id, name: au.name }))
+    const series = this.series.map((se) => ({ id: se.id, name: se.name, sequence: se.bookSeries.sequence }))
+    return {
+      title: this.title,
+      subtitle: this.subtitle,
+      authors,
+      narrators: [...(this.narrators || [])],
+      series,
+      genres: [...(this.genres || [])],
+      publishedYear: this.publishedYear,
+      publishedDate: this.publishedDate,
+      publisher: this.publisher,
+      description: this.description,
+      isbn: this.isbn,
+      asin: this.asin,
+      language: this.language,
+      explicit: this.explicit,
+      abridged: this.abridged
+    }
+  }
+
+  oldMetadataToJSONMinified() {
+    return {
+      title: this.title,
+      titleIgnorePrefix: getTitlePrefixAtEnd(this.title),
+      subtitle: this.subtitle,
+      authorName: this.authorName,
+      authorNameLF: this.authorNameLF,
+      narratorName: (this.narrators || []).join(', '),
+      seriesName: this.seriesName,
+      genres: [...(this.genres || [])],
+      publishedYear: this.publishedYear,
+      publishedDate: this.publishedDate,
+      publisher: this.publisher,
+      description: this.description,
+      isbn: this.isbn,
+      asin: this.asin,
+      language: this.language,
+      explicit: this.explicit,
+      abridged: this.abridged
+    }
+  }
+
+  oldMetadataToJSONExpanded() {
+    const oldMetadataJSON = this.oldMetadataToJSON()
+    oldMetadataJSON.titleIgnorePrefix = getTitlePrefixAtEnd(this.title)
+    oldMetadataJSON.authorName = this.authorName
+    oldMetadataJSON.authorNameLF = this.authorNameLF
+    oldMetadataJSON.narratorName = (this.narrators || []).join(', ')
+    oldMetadataJSON.seriesName = this.seriesName
+    return oldMetadataJSON
+  }
+
+  /**
+   * The old model stored a minified series and authors array with the book object.
+   * Minified series is { id, name, sequence }
+   * Minified author is { id, name }
+   *
+   * @param {string} libraryItemId
+   */
+  toOldJSON(libraryItemId) {
+    if (!libraryItemId) {
+      throw new Error(`[Book] Cannot convert to old JSON because libraryItemId is not provided`)
+    }
+    if (!this.authors) {
+      throw new Error(`[Book] Cannot convert to old JSON because authors are not loaded`)
+    }
+    if (!this.series) {
+      throw new Error(`[Book] Cannot convert to old JSON because series are not loaded`)
+    }
+
+    return {
+      id: this.id,
+      libraryItemId: libraryItemId,
+      metadata: this.oldMetadataToJSON(),
+      coverPath: this.coverPath,
+      tags: [...(this.tags || [])],
+      audioFiles: structuredClone(this.audioFiles),
+      chapters: structuredClone(this.chapters),
+      ebookFile: structuredClone(this.ebookFile)
+    }
+  }
+
+  toOldJSONMinified() {
+    if (!this.authors) {
+      throw new Error(`[Book] Cannot convert to old JSON because authors are not loaded`)
+    }
+    if (!this.series) {
+      throw new Error(`[Book] Cannot convert to old JSON because series are not loaded`)
+    }
+
+    return {
+      id: this.id,
+      metadata: this.oldMetadataToJSONMinified(),
+      coverPath: this.coverPath,
+      tags: [...(this.tags || [])],
+      numTracks: this.trackList.length,
+      numAudioFiles: this.audioFiles?.length || 0,
+      numChapters: this.chapters?.length || 0,
+      duration: this.duration,
+      size: this.size,
+      ebookFormat: this.ebookFile?.ebookFormat
+    }
+  }
+
+  toOldJSONExpanded(libraryItemId) {
+    if (!libraryItemId) {
+      throw new Error(`[Book] Cannot convert to old JSON because libraryItemId is not provided`)
+    }
+    if (!this.authors) {
+      throw new Error(`[Book] Cannot convert to old JSON because authors are not loaded`)
+    }
+    if (!this.series) {
+      throw new Error(`[Book] Cannot convert to old JSON because series are not loaded`)
+    }
+
+    return {
+      id: this.id,
+      libraryItemId: libraryItemId,
+      metadata: this.oldMetadataToJSONExpanded(),
+      coverPath: this.coverPath,
+      tags: [...(this.tags || [])],
+      audioFiles: structuredClone(this.audioFiles),
+      chapters: structuredClone(this.chapters),
+      ebookFile: structuredClone(this.ebookFile),
+      duration: this.duration,
+      size: this.size,
+      tracks: structuredClone(this.trackList)
+    }
+  }
 }
 
 module.exports = Book
diff --git a/server/models/LibraryItem.js b/server/models/LibraryItem.js
index 2aa41b703e..03e67a9ed3 100644
--- a/server/models/LibraryItem.js
+++ b/server/models/LibraryItem.js
@@ -865,54 +865,6 @@ class LibraryItem extends Model {
     return libraryItem.media.coverPath
   }
 
-  /**
-   *
-   * @param {import('sequelize').FindOptions} options
-   * @returns {Promise<Book|Podcast>}
-   */
-  getMedia(options) {
-    if (!this.mediaType) return Promise.resolve(null)
-    const mixinMethodName = `get${this.sequelize.uppercaseFirst(this.mediaType)}`
-    return this[mixinMethodName](options)
-  }
-
-  /**
-   *
-   * @returns {Promise<Book|Podcast>}
-   */
-  getMediaExpanded() {
-    if (this.mediaType === 'podcast') {
-      return this.getMedia({
-        include: [
-          {
-            model: this.sequelize.models.podcastEpisode
-          }
-        ]
-      })
-    } else {
-      return this.getMedia({
-        include: [
-          {
-            model: this.sequelize.models.author,
-            through: {
-              attributes: []
-            }
-          },
-          {
-            model: this.sequelize.models.series,
-            through: {
-              attributes: ['sequence']
-            }
-          }
-        ],
-        order: [
-          [this.sequelize.models.author, this.sequelize.models.bookAuthor, 'createdAt', 'ASC'],
-          [this.sequelize.models.series, 'bookSeries', 'createdAt', 'ASC']
-        ]
-      })
-    }
-  }
-
   /**
    *
    * @returns {Promise}
@@ -1131,6 +1083,64 @@ class LibraryItem extends Model {
     })
   }
 
+  get isBook() {
+    return this.mediaType === 'book'
+  }
+  get isPodcast() {
+    return this.mediaType === 'podcast'
+  }
+  get hasAudioTracks() {
+    return this.media.hasAudioTracks()
+  }
+
+  /**
+   *
+   * @param {import('sequelize').FindOptions} options
+   * @returns {Promise<Book|Podcast>}
+   */
+  getMedia(options) {
+    if (!this.mediaType) return Promise.resolve(null)
+    const mixinMethodName = `get${this.sequelize.uppercaseFirst(this.mediaType)}`
+    return this[mixinMethodName](options)
+  }
+
+  /**
+   *
+   * @returns {Promise<Book|Podcast>}
+   */
+  getMediaExpanded() {
+    if (this.mediaType === 'podcast') {
+      return this.getMedia({
+        include: [
+          {
+            model: this.sequelize.models.podcastEpisode
+          }
+        ]
+      })
+    } else {
+      return this.getMedia({
+        include: [
+          {
+            model: this.sequelize.models.author,
+            through: {
+              attributes: []
+            }
+          },
+          {
+            model: this.sequelize.models.series,
+            through: {
+              attributes: ['sequence']
+            }
+          }
+        ],
+        order: [
+          [this.sequelize.models.author, this.sequelize.models.bookAuthor, 'createdAt', 'ASC'],
+          [this.sequelize.models.series, 'bookSeries', 'createdAt', 'ASC']
+        ]
+      })
+    }
+  }
+
   /**
    * Check if book or podcast library item has audio tracks
    * Requires expanded library item
@@ -1142,12 +1152,133 @@ class LibraryItem extends Model {
       Logger.error(`[LibraryItem] hasAudioTracks: Library item "${this.id}" does not have media`)
       return false
     }
-    if (this.mediaType === 'book') {
+    if (this.isBook) {
       return this.media.audioFiles?.length > 0
     } else {
       return this.media.podcastEpisodes?.length > 0
     }
   }
+
+  /**
+   *
+   * @param {string} ino
+   * @returns {import('./Book').AudioFileObject}
+   */
+  getAudioFileWithIno(ino) {
+    if (!this.media) {
+      Logger.error(`[LibraryItem] getAudioFileWithIno: Library item "${this.id}" does not have media`)
+      return null
+    }
+    if (this.isBook) {
+      return this.media.audioFiles.find((af) => af.ino === ino)
+    } else {
+      return this.media.podcastEpisodes.find((pe) => pe.audioFile?.ino === ino)?.audioFile
+    }
+  }
+
+  /**
+   *
+   * @param {string} ino
+   * @returns {LibraryFile}
+   */
+  getLibraryFileWithIno(ino) {
+    const libraryFile = this.libraryFiles.find((lf) => lf.ino === ino)
+    if (!libraryFile) return null
+    return new LibraryFile(libraryFile)
+  }
+
+  getLibraryFiles() {
+    return this.libraryFiles.map((lf) => new LibraryFile(lf))
+  }
+
+  getLibraryFilesJson() {
+    return this.libraryFiles.map((lf) => new LibraryFile(lf).toJSON())
+  }
+
+  toOldJSON() {
+    if (!this.media) {
+      throw new Error(`[LibraryItem] Cannot convert to old JSON without media for library item "${this.id}"`)
+    }
+
+    return {
+      id: this.id,
+      ino: this.ino,
+      oldLibraryItemId: this.extraData?.oldLibraryItemId || null,
+      libraryId: this.libraryId,
+      folderId: this.libraryFolderId,
+      path: this.path,
+      relPath: this.relPath,
+      isFile: this.isFile,
+      mtimeMs: this.mtime?.valueOf(),
+      ctimeMs: this.ctime?.valueOf(),
+      birthtimeMs: this.birthtime?.valueOf(),
+      addedAt: this.createdAt.valueOf(),
+      updatedAt: this.updatedAt.valueOf(),
+      lastScan: this.lastScan?.valueOf(),
+      scanVersion: this.lastScanVersion,
+      isMissing: !!this.isMissing,
+      isInvalid: !!this.isInvalid,
+      mediaType: this.mediaType,
+      media: this.media.toOldJSON(this.id),
+      // LibraryFile JSON includes a fileType property that may not be saved in libraryFiles column in the database
+      libraryFiles: this.getLibraryFilesJson()
+    }
+  }
+
+  toOldJSONMinified() {
+    if (!this.media) {
+      throw new Error(`[LibraryItem] Cannot convert to old JSON without media for library item "${this.id}"`)
+    }
+
+    return {
+      id: this.id,
+      ino: this.ino,
+      oldLibraryItemId: this.extraData?.oldLibraryItemId || null,
+      libraryId: this.libraryId,
+      folderId: this.libraryFolderId,
+      path: this.path,
+      relPath: this.relPath,
+      isFile: this.isFile,
+      mtimeMs: this.mtime?.valueOf(),
+      ctimeMs: this.ctime?.valueOf(),
+      birthtimeMs: this.birthtime?.valueOf(),
+      addedAt: this.createdAt.valueOf(),
+      updatedAt: this.updatedAt.valueOf(),
+      isMissing: !!this.isMissing,
+      isInvalid: !!this.isInvalid,
+      mediaType: this.mediaType,
+      media: this.media.toOldJSONMinified(),
+      numFiles: this.libraryFiles.length,
+      size: this.size
+    }
+  }
+
+  toOldJSONExpanded() {
+    return {
+      id: this.id,
+      ino: this.ino,
+      oldLibraryItemId: this.extraData?.oldLibraryItemId || null,
+      libraryId: this.libraryId,
+      folderId: this.libraryFolderId,
+      path: this.path,
+      relPath: this.relPath,
+      isFile: this.isFile,
+      mtimeMs: this.mtime?.valueOf(),
+      ctimeMs: this.ctime?.valueOf(),
+      birthtimeMs: this.birthtime?.valueOf(),
+      addedAt: this.createdAt.valueOf(),
+      updatedAt: this.updatedAt.valueOf(),
+      lastScan: this.lastScan?.valueOf(),
+      scanVersion: this.lastScanVersion,
+      isMissing: !!this.isMissing,
+      isInvalid: !!this.isInvalid,
+      mediaType: this.mediaType,
+      media: this.media.toOldJSONExpanded(this.id),
+      // LibraryFile JSON includes a fileType property that may not be saved in libraryFiles column in the database
+      libraryFiles: this.getLibraryFilesJson(),
+      size: this.size
+    }
+  }
 }
 
 module.exports = LibraryItem
diff --git a/server/models/Podcast.js b/server/models/Podcast.js
index 60f879d0e4..172e36a2cd 100644
--- a/server/models/Podcast.js
+++ b/server/models/Podcast.js
@@ -1,4 +1,6 @@
 const { DataTypes, Model } = require('sequelize')
+const { getTitlePrefixAtEnd, getTitleIgnorePrefix } = require('../utils')
+const Logger = require('../Logger')
 
 /**
  * @typedef PodcastExpandedProperties
@@ -47,6 +49,8 @@ class Podcast extends Model {
     this.lastEpisodeCheck
     /** @type {number} */
     this.maxEpisodesToKeep
+    /** @type {number} */
+    this.maxNewEpisodesToDownload
     /** @type {string} */
     this.coverPath
     /** @type {string[]} */
@@ -57,6 +61,9 @@ class Podcast extends Model {
     this.createdAt
     /** @type {Date} */
     this.updatedAt
+
+    /** @type {import('./PodcastEpisode')[]} */
+    this.podcastEpisodes
   }
 
   static getOldPodcast(libraryItemExpanded) {
@@ -119,25 +126,6 @@ class Podcast extends Model {
     }
   }
 
-  getAbsMetadataJson() {
-    return {
-      tags: this.tags || [],
-      title: this.title,
-      author: this.author,
-      description: this.description,
-      releaseDate: this.releaseDate,
-      genres: this.genres || [],
-      feedURL: this.feedURL,
-      imageURL: this.imageURL,
-      itunesPageURL: this.itunesPageURL,
-      itunesId: this.itunesId,
-      itunesArtistId: this.itunesArtistId,
-      language: this.language,
-      explicit: !!this.explicit,
-      podcastType: this.podcastType
-    }
-  }
-
   /**
    * Initialize model
    * @param {import('../Database').sequelize} sequelize
@@ -179,6 +167,210 @@ class Podcast extends Model {
       }
     )
   }
+
+  get hasMediaFiles() {
+    return !!this.podcastEpisodes?.length
+  }
+
+  get hasAudioTracks() {
+    return this.hasMediaFiles
+  }
+
+  get size() {
+    if (!this.podcastEpisodes?.length) return 0
+    return this.podcastEpisodes.reduce((total, episode) => total + episode.size, 0)
+  }
+
+  getAbsMetadataJson() {
+    return {
+      tags: this.tags || [],
+      title: this.title,
+      author: this.author,
+      description: this.description,
+      releaseDate: this.releaseDate,
+      genres: this.genres || [],
+      feedURL: this.feedURL,
+      imageURL: this.imageURL,
+      itunesPageURL: this.itunesPageURL,
+      itunesId: this.itunesId,
+      itunesArtistId: this.itunesArtistId,
+      language: this.language,
+      explicit: !!this.explicit,
+      podcastType: this.podcastType
+    }
+  }
+
+  /**
+   *
+   * @param {Object} payload - Old podcast object
+   * @returns {Promise<boolean>}
+   */
+  async updateFromRequest(payload) {
+    if (!payload) return false
+
+    let hasUpdates = false
+
+    if (payload.metadata) {
+      const stringKeys = ['title', 'author', 'releaseDate', 'feedUrl', 'imageUrl', 'description', 'itunesPageUrl', 'itunesId', 'itunesArtistId', 'language', 'type']
+      stringKeys.forEach((key) => {
+        let newKey = key
+        if (key === 'type') {
+          newKey = 'podcastType'
+        } else if (key === 'feedUrl') {
+          newKey = 'feedURL'
+        } else if (key === 'imageUrl') {
+          newKey = 'imageURL'
+        } else if (key === 'itunesPageUrl') {
+          newKey = 'itunesPageURL'
+        }
+        if (typeof payload.metadata[key] === 'string' && payload.metadata[key] !== this[newKey]) {
+          this[newKey] = payload.metadata[key]
+          if (key === 'title') {
+            this.titleIgnorePrefix = getTitleIgnorePrefix(this.title)
+          }
+
+          hasUpdates = true
+        }
+      })
+
+      if (payload.metadata.explicit !== undefined && payload.metadata.explicit !== this.explicit) {
+        this.explicit = !!payload.metadata.explicit
+        hasUpdates = true
+      }
+
+      if (Array.isArray(payload.metadata.genres) && !payload.metadata.genres.some((item) => typeof item !== 'string') && JSON.stringify(this.genres) !== JSON.stringify(payload.metadata.genres)) {
+        this.genres = payload.metadata.genres
+        this.changed('genres', true)
+        hasUpdates = true
+      }
+    }
+
+    if (Array.isArray(payload.tags) && !payload.tags.some((item) => typeof item !== 'string') && JSON.stringify(this.tags) !== JSON.stringify(payload.tags)) {
+      this.tags = payload.tags
+      this.changed('tags', true)
+      hasUpdates = true
+    }
+
+    if (payload.autoDownloadEpisodes !== undefined && payload.autoDownloadEpisodes !== this.autoDownloadEpisodes) {
+      this.autoDownloadEpisodes = !!payload.autoDownloadEpisodes
+      hasUpdates = true
+    }
+    if (typeof payload.autoDownloadSchedule === 'string' && payload.autoDownloadSchedule !== this.autoDownloadSchedule) {
+      this.autoDownloadSchedule = payload.autoDownloadSchedule
+      hasUpdates = true
+    }
+
+    const numberKeys = ['maxEpisodesToKeep', 'maxNewEpisodesToDownload']
+    numberKeys.forEach((key) => {
+      if (typeof payload[key] === 'number' && payload[key] !== this[key]) {
+        this[key] = payload[key]
+        hasUpdates = true
+      }
+    })
+
+    if (hasUpdates) {
+      Logger.debug(`[Podcast] changed keys:`, this.changed())
+      await this.save()
+    }
+
+    return hasUpdates
+  }
+
+  /**
+   * Old model kept metadata in a separate object
+   */
+  oldMetadataToJSON() {
+    return {
+      title: this.title,
+      author: this.author,
+      description: this.description,
+      releaseDate: this.releaseDate,
+      genres: [...(this.genres || [])],
+      feedUrl: this.feedURL,
+      imageUrl: this.imageURL,
+      itunesPageUrl: this.itunesPageURL,
+      itunesId: this.itunesId,
+      itunesArtistId: this.itunesArtistId,
+      explicit: this.explicit,
+      language: this.language,
+      type: this.podcastType
+    }
+  }
+
+  oldMetadataToJSONExpanded() {
+    const oldMetadataJSON = this.oldMetadataToJSON()
+    oldMetadataJSON.titleIgnorePrefix = getTitlePrefixAtEnd(this.title)
+    return oldMetadataJSON
+  }
+
+  /**
+   * The old model stored episodes with the podcast object
+   *
+   * @param {string} libraryItemId
+   */
+  toOldJSON(libraryItemId) {
+    if (!libraryItemId) {
+      throw new Error(`[Podcast] Cannot convert to old JSON because libraryItemId is not provided`)
+    }
+    if (!this.podcastEpisodes) {
+      throw new Error(`[Podcast] Cannot convert to old JSON because episodes are not provided`)
+    }
+
+    return {
+      id: this.id,
+      libraryItemId: libraryItemId,
+      metadata: this.oldMetadataToJSON(),
+      coverPath: this.coverPath,
+      tags: [...(this.tags || [])],
+      episodes: this.podcastEpisodes.map((episode) => episode.toOldJSON(libraryItemId)),
+      autoDownloadEpisodes: this.autoDownloadEpisodes,
+      autoDownloadSchedule: this.autoDownloadSchedule,
+      lastEpisodeCheck: this.lastEpisodeCheck?.valueOf() || null,
+      maxEpisodesToKeep: this.maxEpisodesToKeep,
+      maxNewEpisodesToDownload: this.maxNewEpisodesToDownload
+    }
+  }
+
+  toOldJSONMinified() {
+    return {
+      id: this.id,
+      // Minified metadata and expanded metadata are the same
+      metadata: this.oldMetadataToJSONExpanded(),
+      coverPath: this.coverPath,
+      tags: [...(this.tags || [])],
+      numEpisodes: this.podcastEpisodes?.length || 0,
+      autoDownloadEpisodes: this.autoDownloadEpisodes,
+      autoDownloadSchedule: this.autoDownloadSchedule,
+      lastEpisodeCheck: this.lastEpisodeCheck?.valueOf() || null,
+      maxEpisodesToKeep: this.maxEpisodesToKeep,
+      maxNewEpisodesToDownload: this.maxNewEpisodesToDownload,
+      size: this.size
+    }
+  }
+
+  toOldJSONExpanded(libraryItemId) {
+    if (!libraryItemId) {
+      throw new Error(`[Podcast] Cannot convert to old JSON because libraryItemId is not provided`)
+    }
+    if (!this.podcastEpisodes) {
+      throw new Error(`[Podcast] Cannot convert to old JSON because episodes are not provided`)
+    }
+
+    return {
+      id: this.id,
+      libraryItemId: libraryItemId,
+      metadata: this.oldMetadataToJSONExpanded(),
+      coverPath: this.coverPath,
+      tags: [...(this.tags || [])],
+      episodes: this.podcastEpisodes.map((e) => e.toOldJSONExpanded(libraryItemId)),
+      autoDownloadEpisodes: this.autoDownloadEpisodes,
+      autoDownloadSchedule: this.autoDownloadSchedule,
+      lastEpisodeCheck: this.lastEpisodeCheck?.valueOf() || null,
+      maxEpisodesToKeep: this.maxEpisodesToKeep,
+      maxNewEpisodesToDownload: this.maxNewEpisodesToDownload,
+      size: this.size
+    }
+  }
 }
 
 module.exports = Podcast
diff --git a/server/models/PodcastEpisode.js b/server/models/PodcastEpisode.js
index 1fa32da7a3..23d237e020 100644
--- a/server/models/PodcastEpisode.js
+++ b/server/models/PodcastEpisode.js
@@ -53,42 +53,6 @@ class PodcastEpisode extends Model {
     this.updatedAt
   }
 
-  /**
-   * @param {string} libraryItemId
-   * @returns {oldPodcastEpisode}
-   */
-  getOldPodcastEpisode(libraryItemId = null) {
-    let enclosure = null
-    if (this.enclosureURL) {
-      enclosure = {
-        url: this.enclosureURL,
-        type: this.enclosureType,
-        length: this.enclosureSize !== null ? String(this.enclosureSize) : null
-      }
-    }
-    return new oldPodcastEpisode({
-      libraryItemId: libraryItemId || null,
-      podcastId: this.podcastId,
-      id: this.id,
-      oldEpisodeId: this.extraData?.oldEpisodeId || null,
-      index: this.index,
-      season: this.season,
-      episode: this.episode,
-      episodeType: this.episodeType,
-      title: this.title,
-      subtitle: this.subtitle,
-      description: this.description,
-      enclosure,
-      guid: this.extraData?.guid || null,
-      pubDate: this.pubDate,
-      chapters: this.chapters,
-      audioFile: this.audioFile,
-      publishedAt: this.publishedAt?.valueOf() || null,
-      addedAt: this.createdAt.valueOf(),
-      updatedAt: this.updatedAt.valueOf()
-    })
-  }
-
   static createFromOld(oldEpisode) {
     const podcastEpisode = this.getFromOld(oldEpisode)
     return this.create(podcastEpisode)
@@ -184,7 +148,51 @@ class PodcastEpisode extends Model {
     return track
   }
 
+  get size() {
+    return this.audioFile?.metadata.size || 0
+  }
+
+  /**
+   * @param {string} libraryItemId
+   * @returns {oldPodcastEpisode}
+   */
+  getOldPodcastEpisode(libraryItemId = null) {
+    let enclosure = null
+    if (this.enclosureURL) {
+      enclosure = {
+        url: this.enclosureURL,
+        type: this.enclosureType,
+        length: this.enclosureSize !== null ? String(this.enclosureSize) : null
+      }
+    }
+    return new oldPodcastEpisode({
+      libraryItemId: libraryItemId || null,
+      podcastId: this.podcastId,
+      id: this.id,
+      oldEpisodeId: this.extraData?.oldEpisodeId || null,
+      index: this.index,
+      season: this.season,
+      episode: this.episode,
+      episodeType: this.episodeType,
+      title: this.title,
+      subtitle: this.subtitle,
+      description: this.description,
+      enclosure,
+      guid: this.extraData?.guid || null,
+      pubDate: this.pubDate,
+      chapters: this.chapters,
+      audioFile: this.audioFile,
+      publishedAt: this.publishedAt?.valueOf() || null,
+      addedAt: this.createdAt.valueOf(),
+      updatedAt: this.updatedAt.valueOf()
+    })
+  }
+
   toOldJSON(libraryItemId) {
+    if (!libraryItemId) {
+      throw new Error(`[PodcastEpisode] Cannot convert to old JSON because libraryItemId is not provided`)
+    }
+
     let enclosure = null
     if (this.enclosureURL) {
       enclosure = {
@@ -209,8 +217,8 @@ class PodcastEpisode extends Model {
       enclosure,
       guid: this.extraData?.guid || null,
       pubDate: this.pubDate,
-      chapters: this.chapters?.map((ch) => ({ ...ch })) || [],
-      audioFile: this.audioFile || null,
+      chapters: structuredClone(this.chapters),
+      audioFile: structuredClone(this.audioFile),
       publishedAt: this.publishedAt?.valueOf() || null,
       addedAt: this.createdAt.valueOf(),
       updatedAt: this.updatedAt.valueOf()
@@ -221,7 +229,7 @@ class PodcastEpisode extends Model {
     const json = this.toOldJSON(libraryItemId)
 
     json.audioTrack = this.track
-    json.size = this.audioFile?.metadata.size || 0
+    json.size = this.size
     json.duration = this.audioFile?.duration || 0
 
     return json
diff --git a/server/objects/LibraryItem.js b/server/objects/LibraryItem.js
index 84a37897a7..6578bae0c5 100644
--- a/server/objects/LibraryItem.js
+++ b/server/objects/LibraryItem.js
@@ -177,9 +177,6 @@ class LibraryItem {
   get hasAudioFiles() {
     return this.libraryFiles.some((lf) => lf.fileType === 'audio')
   }
-  get hasMediaEntities() {
-    return this.media.hasMediaEntities
-  }
 
   // Data comes from scandir library item data
   // TODO: Remove this function. Only used when creating a new podcast now
@@ -327,20 +324,5 @@ class LibraryItem {
     }
     return false
   }
-
-  /**
-   * Set the EBookFile from a LibraryFile
-   * If null then ebookFile will be removed from the book
-   * all ebook library files that are not primary are marked as supplementary
-   *
-   * @param {LibraryFile} [libraryFile]
-   */
-  setPrimaryEbook(ebookLibraryFile = null) {
-    const ebookLibraryFiles = this.libraryFiles.filter((lf) => lf.isEBookFile)
-    for (const libraryFile of ebookLibraryFiles) {
-      libraryFile.isSupplementary = ebookLibraryFile?.ino !== libraryFile.ino
-    }
-    this.media.setEbookFile(ebookLibraryFile)
-  }
 }
 module.exports = LibraryItem
diff --git a/server/objects/mediaTypes/Book.js b/server/objects/mediaTypes/Book.js
index 8fdff98892..5d45501859 100644
--- a/server/objects/mediaTypes/Book.js
+++ b/server/objects/mediaTypes/Book.js
@@ -33,8 +33,8 @@ class Book {
     this.metadata = new BookMetadata(book.metadata)
     this.coverPath = book.coverPath
     this.tags = [...book.tags]
-    this.audioFiles = book.audioFiles.map(f => new AudioFile(f))
-    this.chapters = book.chapters.map(c => ({ ...c }))
+    this.audioFiles = book.audioFiles.map((f) => new AudioFile(f))
+    this.chapters = book.chapters.map((c) => ({ ...c }))
     this.ebookFile = book.ebookFile ? new EBookFile(book.ebookFile) : null
     this.lastCoverSearch = book.lastCoverSearch || null
     this.lastCoverSearchQuery = book.lastCoverSearchQuery || null
@@ -47,8 +47,8 @@ class Book {
       metadata: this.metadata.toJSON(),
       coverPath: this.coverPath,
       tags: [...this.tags],
-      audioFiles: this.audioFiles.map(f => f.toJSON()),
-      chapters: this.chapters.map(c => ({ ...c })),
+      audioFiles: this.audioFiles.map((f) => f.toJSON()),
+      chapters: this.chapters.map((c) => ({ ...c })),
       ebookFile: this.ebookFile ? this.ebookFile.toJSON() : null
     }
   }
@@ -75,11 +75,11 @@ class Book {
       metadata: this.metadata.toJSONExpanded(),
       coverPath: this.coverPath,
       tags: [...this.tags],
-      audioFiles: this.audioFiles.map(f => f.toJSON()),
-      chapters: this.chapters.map(c => ({ ...c })),
+      audioFiles: this.audioFiles.map((f) => f.toJSON()),
+      chapters: this.chapters.map((c) => ({ ...c })),
       duration: this.duration,
       size: this.size,
-      tracks: this.tracks.map(t => t.toJSON()),
+      tracks: this.tracks.map((t) => t.toJSON()),
       ebookFile: this.ebookFile?.toJSON() || null
     }
   }
@@ -87,24 +87,21 @@ class Book {
   toJSONForMetadataFile() {
     return {
       tags: [...this.tags],
-      chapters: this.chapters.map(c => ({ ...c })),
+      chapters: this.chapters.map((c) => ({ ...c })),
       ...this.metadata.toJSONForMetadataFile()
     }
   }
 
   get size() {
     var total = 0
-    this.audioFiles.forEach((af) => total += af.metadata.size)
+    this.audioFiles.forEach((af) => (total += af.metadata.size))
     if (this.ebookFile) {
       total += this.ebookFile.metadata.size
     }
     return total
   }
-  get hasMediaEntities() {
-    return !!this.tracks.length || this.ebookFile
-  }
   get includedAudioFiles() {
-    return this.audioFiles.filter(af => !af.exclude)
+    return this.audioFiles.filter((af) => !af.exclude)
   }
   get tracks() {
     let startOffset = 0
@@ -117,7 +114,7 @@ class Book {
   }
   get duration() {
     let total = 0
-    this.tracks.forEach((track) => total += track.duration)
+    this.tracks.forEach((track) => (total += track.duration))
     return total
   }
   get numTracks() {
@@ -129,8 +126,6 @@ class Book {
 
   update(payload) {
     const json = this.toJSON()
-    delete json.audiobooks // do not update media entities here
-    delete json.ebooks
 
     let hasUpdates = false
     for (const key in json) {
@@ -149,30 +144,6 @@ class Book {
     return hasUpdates
   }
 
-  updateChapters(chapters) {
-    var hasUpdates = this.chapters.length !== chapters.length
-    if (hasUpdates) {
-      this.chapters = chapters.map(ch => ({
-        id: ch.id,
-        start: ch.start,
-        end: ch.end,
-        title: ch.title
-      }))
-    } else {
-      for (let i = 0; i < this.chapters.length; i++) {
-        const currChapter = this.chapters[i]
-        const newChapter = chapters[i]
-        if (!hasUpdates && (currChapter.title !== newChapter.title || currChapter.start !== newChapter.start || currChapter.end !== newChapter.end)) {
-          hasUpdates = true
-        }
-        this.chapters[i].title = newChapter.title
-        this.chapters[i].start = newChapter.start
-        this.chapters[i].end = newChapter.end
-      }
-    }
-    return hasUpdates
-  }
-
   updateCover(coverPath) {
     coverPath = filePathToPOSIX(coverPath)
     if (this.coverPath === coverPath) return false
@@ -180,75 +151,6 @@ class Book {
     return true
   }
 
-  removeFileWithInode(inode) {
-    if (this.audioFiles.some(af => af.ino === inode)) {
-      this.audioFiles = this.audioFiles.filter(af => af.ino !== inode)
-      return true
-    }
-    if (this.ebookFile && this.ebookFile.ino === inode) {
-      this.ebookFile = null
-      return true
-    }
-    return false
-  }
-
-  /**
-   * Get audio file or ebook file from inode
-   * @param {string} inode 
-   * @returns {(AudioFile|EBookFile|null)}
-   */
-  findFileWithInode(inode) {
-    const audioFile = this.audioFiles.find(af => af.ino === inode)
-    if (audioFile) return audioFile
-    if (this.ebookFile && this.ebookFile.ino === inode) return this.ebookFile
-    return null
-  }
-
-  /**
-   * Set the EBookFile from a LibraryFile
-   * If null then ebookFile will be removed from the book
-   * 
-   * @param {LibraryFile} [libraryFile] 
-   */
-  setEbookFile(libraryFile = null) {
-    if (!libraryFile) {
-      this.ebookFile = null
-    } else {
-      const ebookFile = new EBookFile()
-      ebookFile.setData(libraryFile)
-      this.ebookFile = ebookFile
-    }
-  }
-
-  addAudioFile(audioFile) {
-    this.audioFiles.push(audioFile)
-  }
-
-  updateAudioTracks(orderedFileData) {
-    let index = 1
-    this.audioFiles = orderedFileData.map((fileData) => {
-      const audioFile = this.audioFiles.find(af => af.ino === fileData.ino)
-      audioFile.manuallyVerified = true
-      audioFile.error = null
-      if (fileData.exclude !== undefined) {
-        audioFile.exclude = !!fileData.exclude
-      }
-      if (audioFile.exclude) {
-        audioFile.index = -1
-      } else {
-        audioFile.index = index++
-      }
-      return audioFile
-    })
-
-    this.rebuildTracks()
-  }
-
-  rebuildTracks() {
-    Logger.debug(`[Book] Tracks being rebuilt...!`)
-    this.audioFiles.sort((a, b) => a.index - b.index)
-  }
-
   // Only checks container format
   checkCanDirectPlay(payload) {
     var supportedMimeTypes = payload.supportedMimeTypes || []
@@ -268,7 +170,7 @@ class Book {
   }
 
   getChapters() {
-    return this.chapters?.map(ch => ({ ...ch })) || []
+    return this.chapters?.map((ch) => ({ ...ch })) || []
   }
 }
 module.exports = Book
diff --git a/server/objects/mediaTypes/Podcast.js b/server/objects/mediaTypes/Podcast.js
index c7d91d0da9..d33b28ba2c 100644
--- a/server/objects/mediaTypes/Podcast.js
+++ b/server/objects/mediaTypes/Podcast.js
@@ -124,9 +124,6 @@ class Podcast {
     this.episodes.forEach((ep) => (total += ep.size))
     return total
   }
-  get hasMediaEntities() {
-    return !!this.episodes.length
-  }
   get duration() {
     let total = 0
     this.episodes.forEach((ep) => (total += ep.duration))
@@ -181,20 +178,6 @@ class Podcast {
     return true
   }
 
-  removeFileWithInode(inode) {
-    const hasEpisode = this.episodes.some((ep) => ep.audioFile.ino === inode)
-    if (hasEpisode) {
-      this.episodes = this.episodes.filter((ep) => ep.audioFile.ino !== inode)
-    }
-    return hasEpisode
-  }
-
-  findFileWithInode(inode) {
-    var episode = this.episodes.find((ep) => ep.audioFile.ino === inode)
-    if (episode) return episode.audioFile
-    return null
-  }
-
   setData(mediaData) {
     this.metadata = new PodcastMetadata()
     if (mediaData.metadata) {
diff --git a/server/scanner/AudioFileScanner.js b/server/scanner/AudioFileScanner.js
index 6c808aaa1c..00bd44d339 100644
--- a/server/scanner/AudioFileScanner.js
+++ b/server/scanner/AudioFileScanner.js
@@ -202,12 +202,12 @@ class AudioFileScanner {
 
   /**
    *
-   * @param {AudioFile} audioFile
+   * @param {string} audioFilePath
    * @returns {object}
    */
-  probeAudioFile(audioFile) {
-    Logger.debug(`[AudioFileScanner] Running ffprobe for audio file at "${audioFile.metadata.path}"`)
-    return prober.rawProbe(audioFile.metadata.path)
+  probeAudioFile(audioFilePath) {
+    Logger.debug(`[AudioFileScanner] Running ffprobe for audio file at "${audioFilePath}"`)
+    return prober.rawProbe(audioFilePath)
   }
 
   /**
diff --git a/test/server/controllers/LibraryItemController.test.js b/test/server/controllers/LibraryItemController.test.js
index 3fcd1cf817..fb65cc4bcf 100644
--- a/test/server/controllers/LibraryItemController.test.js
+++ b/test/server/controllers/LibraryItemController.test.js
@@ -82,11 +82,11 @@ describe('LibraryItemController', () => {
     })
 
     it('should remove authors and series with no books on library item delete', async () => {
-      const oldLibraryItem = await Database.libraryItemModel.getOldById(libraryItem1Id)
+      const libraryItem = await Database.libraryItemModel.getExpandedById(libraryItem1Id)
 
       const fakeReq = {
         query: {},
-        libraryItem: oldLibraryItem
+        libraryItem
       }
       const fakeRes = {
         sendStatus: sinon.spy()
@@ -156,7 +156,7 @@ describe('LibraryItemController', () => {
     })
 
     it('should remove authors and series with no books on library item update media', async () => {
-      const oldLibraryItem = await Database.libraryItemModel.getOldById(libraryItem1Id)
+      const libraryItem = await Database.libraryItemModel.getExpandedById(libraryItem1Id)
 
       // Update library item 1 remove all authors and series
       const fakeReq = {
@@ -167,7 +167,7 @@ describe('LibraryItemController', () => {
             series: []
           }
         },
-        libraryItem: oldLibraryItem
+        libraryItem
       }
       const fakeRes = {
         json: sinon.spy()