diff --git a/client/pages/item/_id/manage.vue b/client/pages/item/_id/manage.vue
index 13fa21ef..a639ef13 100644
--- a/client/pages/item/_id/manage.vue
+++ b/client/pages/item/_id/manage.vue
@@ -1,29 +1,31 @@
 <template>
   <div id="page-wrapper" class="bg-bg page p-8 overflow-auto relative" :class="streamLibraryItem ? 'streaming' : ''">
-    <div class="flex justify-center mb-2">
+    <div class="flex justify-center mb-4">
       <div class="w-full max-w-2xl">
-        <p class="text-xl">Metadata to embed</p>
+        <p class="text-xl mb-2">Metadata to embed</p>
+        <p class="mb-4 text-base text-gray-300">audiobookshelf uses <a href="https://github.com/sandreas/tone" target="_blank" class="hover:underline text-blue-400 hover:text-blue-300">tone</a> to write metadata.</p>
       </div>
       <div class="w-full max-w-2xl"></div>
     </div>
+
     <div class="flex justify-center flex-wrap">
-      <div class="w-full max-w-2xl border border-opacity-10 bg-bg mx-2">
+      <div class="w-full max-w-2xl border border-white border-opacity-10 bg-bg mx-2">
         <div class="flex py-2 px-4">
           <div class="w-1/3 text-xs font-semibold uppercase text-gray-200">Meta Tag</div>
           <div class="w-2/3 text-xs font-semibold uppercase text-gray-200">Value</div>
         </div>
         <div class="w-full max-h-72 overflow-auto">
-          <template v-for="(keyValue, index) in metadataKeyValues">
-            <div :key="keyValue.key" class="flex py-1 px-4 text-sm" :class="index % 2 === 0 ? 'bg-primary bg-opacity-25' : ''">
-              <div class="w-1/3 font-semibold">{{ keyValue.key }}</div>
+          <template v-for="(value, key, index) in toneObject">
+            <div :key="key" class="flex py-1 px-4 text-sm" :class="index % 2 === 0 ? 'bg-primary bg-opacity-25' : ''">
+              <div class="w-1/3 font-semibold">{{ key }}</div>
               <div class="w-2/3">
-                {{ keyValue.value }}
+                {{ value }}
               </div>
             </div>
           </template>
         </div>
       </div>
-      <div class="w-full max-w-2xl border border-opacity-10 bg-bg mx-2">
+      <div class="w-full max-w-2xl border border-white border-opacity-10 bg-bg mx-2">
         <div class="flex py-2 px-4">
           <div class="flex-grow text-xs font-semibold uppercase text-gray-200">Chapter Title</div>
           <div class="w-24 text-xs font-semibold uppercase text-gray-200">Start</div>
@@ -34,10 +36,10 @@
             <div :key="index" class="flex py-1 px-4 text-sm" :class="index % 2 === 0 ? 'bg-primary bg-opacity-25' : ''">
               <div class="flex-grow font-semibold">{{ chapter.title }}</div>
               <div class="w-24">
-                {{ chapter.start.toFixed(2) }}
+                {{ $secondsToTimestamp(chapter.start) }}
               </div>
               <div class="w-24">
-                {{ chapter.end.toFixed(2) }}
+                {{ $secondsToTimestamp(chapter.end) }}
               </div>
             </div>
           </template>
@@ -48,12 +50,17 @@
     <div class="w-full h-px bg-white bg-opacity-10 my-8" />
 
     <div class="w-full max-w-4xl mx-auto">
-      <div class="w-full flex justify-between items-center mb-4">
+      <div class="w-full flex justify-between items-center mb-2">
         <p class="text-warning text-lg font-semibold">Warning: Modifies your audio files</p>
-        <ui-btn v-if="!embedFinished" color="primary" :loading="updatingMetadata" @click="updateAudioFileMetadata">Embed Metadata</ui-btn>
+        <ui-btn v-if="!embedFinished" color="primary" :loading="updatingMetadata" @click.stop="embedClick">Embed Metadata</ui-btn>
         <p v-else class="text-success text-lg font-semibold">Embed Finished!</p>
       </div>
-      <div class="w-full mx-auto border border-opacity-10 bg-bg">
+      <div class="flex mb-4">
+        <p class="text-gray-200">
+          A backup of your audio files will be stored in <span class="rounded-md bg-neutral-600 text-sm text-white py-0.5 px-1 font-mono">/metadata/cache/items/{{ libraryItemId }}/</span> so you can restore the originals if necessary.
+        </p>
+      </div>
+      <div class="w-full mx-auto border border-white border-opacity-10 bg-bg">
         <div class="flex py-2 px-4">
           <div class="w-10 text-xs font-semibold text-gray-200">#</div>
           <div class="flex-grow text-xs font-semibold uppercase text-gray-200">Filename</div>
@@ -118,7 +125,8 @@ export default {
       audiofilesEncoding: {},
       audiofilesFinished: {},
       updatingMetadata: false,
-      embedFinished: false
+      embedFinished: false,
+      toneObject: null
     }
   },
   computed: {
@@ -137,98 +145,35 @@ export default {
     streamLibraryItem() {
       return this.$store.state.streamLibraryItem
     },
-    metadataKeyValues() {
-      const keyValues = [
-        {
-          key: 'title',
-          value: this.mediaMetadata.title
-        },
-        {
-          key: 'artist',
-          value: this.mediaMetadata.authorName
-        },
-        {
-          key: 'album_artist',
-          value: this.mediaMetadata.authorName
-        },
-        {
-          key: 'date',
-          value: this.mediaMetadata.publishedYear
-        },
-        {
-          key: 'description',
-          value: this.mediaMetadata.description
-        },
-        {
-          key: 'genre',
-          value: this.mediaMetadata.genres.join(';')
-        },
-        {
-          key: 'performer',
-          value: this.mediaMetadata.narratorName
-        }
-      ]
-
-      if (this.mediaMetadata.subtitle) {
-        keyValues.push({
-          key: 'subtitle',
-          value: this.mediaMetadata.subtitle
-        })
-      }
-
-      if (this.mediaMetadata.asin) {
-        keyValues.push({
-          key: 'asin',
-          value: this.mediaMetadata.asin
-        })
-      }
-      if (this.mediaMetadata.isbn) {
-        keyValues.push({
-          key: 'isbn',
-          value: this.mediaMetadata.isbn
-        })
-      }
-      if (this.mediaMetadata.language) {
-        keyValues.push({
-          key: 'language',
-          value: this.mediaMetadata.language
-        })
-      }
-      if (this.mediaMetadata.series.length) {
-        var firstSeries = this.mediaMetadata.series[0]
-        keyValues.push({
-          key: 'series',
-          value: firstSeries.name
-        })
-        if (firstSeries.sequence) {
-          keyValues.push({
-            key: 'series-part',
-            value: firstSeries.sequence
-          })
-        }
-      }
-
-      return keyValues
-    },
     metadataChapters() {
       var chapters = this.media.chapters || []
       return chapters.concat(chapters)
     }
   },
   methods: {
-    updateAudioFileMetadata() {
-      if (confirm(`Warning!\n\nThis will modify the audio files for this audiobook.\nMake sure your audio files are backed up before using this feature.`)) {
-        this.updatingMetadata = true
-        this.$axios
-          .$get(`/api/items/${this.libraryItemId}/audio-metadata`)
-          .then(() => {
-            console.log('Audio metadata encode started')
-          })
-          .catch((error) => {
-            console.error('Audio metadata encode failed', error)
-            this.updatingMetadata = false
-          })
+    embedClick() {
+      const payload = {
+        message: `Are you sure you want to embed metadata in ${this.audioFiles.length} audio files?`,
+        callback: (confirmed) => {
+          if (confirmed) {
+            this.updateAudioFileMetadata()
+          }
+        },
+        type: 'yesNo'
       }
+      this.$store.commit('globals/setConfirmPrompt', payload)
+    },
+    updateAudioFileMetadata() {
+      this.updatingMetadata = true
+      this.$axios
+        .$get(`/api/items/${this.libraryItemId}/audio-metadata?tone=1`)
+        .then(() => {
+          console.log('Audio metadata encode started')
+        })
+        .catch((error) => {
+          console.error('Audio metadata encode failed', error)
+          this.updatingMetadata = false
+        })
     },
     audioMetadataStarted(data) {
       console.log('audio metadata started', data)
@@ -252,9 +197,21 @@ export default {
       if (data.libraryItemId !== this.libraryItemId) return
       this.$set(this.audiofilesEncoding, data.ino, false)
       this.$set(this.audiofilesFinished, data.ino, true)
+    },
+    fetchToneObject() {
+      this.$axios
+        .$get(`/api/items/${this.libraryItemId}/tone-object`)
+        .then((toneObject) => {
+          delete toneObject.CoverFile
+          this.toneObject = toneObject
+        })
+        .catch((error) => {
+          console.error('Failed to fetch tone object', error)
+        })
     }
   },
   mounted() {
+    this.fetchToneObject()
     this.$root.socket.on('audio_metadata_started', this.audioMetadataStarted)
     this.$root.socket.on('audio_metadata_finished', this.audioMetadataFinished)
     this.$root.socket.on('audiofile_metadata_started', this.audiofileMetadataStarted)
diff --git a/server/controllers/LibraryItemController.js b/server/controllers/LibraryItemController.js
index acbc6926..bcaa3b33 100644
--- a/server/controllers/LibraryItemController.js
+++ b/server/controllers/LibraryItemController.js
@@ -311,7 +311,7 @@ class LibraryItemController {
       Logger.warn('User other than admin attempted to batch quick match library items', req.user)
       return res.sendStatus(403)
     }
-      
+
     var itemsUpdated = 0
     var itemsUnmatched = 0
 
@@ -322,17 +322,17 @@ class LibraryItemController {
       return res.sendStatus(500)
     }
     res.sendStatus(200)
-    
+
     for (let i = 0; i < items.length; i++) {
-        var libraryItem = this.db.libraryItems.find(_li => _li.id === items[i])
-        var matchResult = await this.scanner.quickMatchLibraryItem(libraryItem, options)
-        if (matchResult.updated) {
-            itemsUpdated++
-        } else if (matchResult.warning) {
-            itemsUnmatched++
-        }
+      var libraryItem = this.db.libraryItems.find(_li => _li.id === items[i])
+      var matchResult = await this.scanner.quickMatchLibraryItem(libraryItem, options)
+      if (matchResult.updated) {
+        itemsUpdated++
+      } else if (matchResult.warning) {
+        itemsUnmatched++
+      }
     }
-    
+
     var result = {
       success: itemsUpdated > 0,
       updates: itemsUpdated,
@@ -371,6 +371,20 @@ class LibraryItemController {
     })
   }
 
+  getToneMetadataObject(req, res) {
+    if (!req.user.isAdminOrUp) {
+      Logger.error(`[LibraryItemController] Non-root user attempted to get tone metadata object`, req.user)
+      return res.sendStatus(403)
+    }
+
+    if (req.libraryItem.isMissing || !req.libraryItem.hasAudioFiles || !req.libraryItem.isBook) {
+      Logger.error(`[LibraryItemController] Invalid library item`)
+      return res.sendStatus(500)
+    }
+
+    res.json(this.audioMetadataManager.getToneMetadataObjectForApi(req.libraryItem))
+  }
+
   // GET: api/items/:id/audio-metadata
   async updateAudioFileMetadata(req, res) {
     if (!req.user.isAdminOrUp) {
@@ -383,7 +397,8 @@ class LibraryItemController {
       return res.sendStatus(500)
     }
 
-    this.audioMetadataManager.updateAudioFileMetadataForItem(req.user, req.libraryItem)
+    const useTone = req.query.tone === '1'
+    this.audioMetadataManager.updateMetadataForItem(req.user, req.libraryItem, useTone)
     res.sendStatus(200)
   }
 
diff --git a/server/managers/AudioMetadataManager.js b/server/managers/AudioMetadataManager.js
index 37bf6983..258c39a2 100644
--- a/server/managers/AudioMetadataManager.js
+++ b/server/managers/AudioMetadataManager.js
@@ -5,6 +5,7 @@ const Logger = require('../Logger')
 const filePerms = require('../utils/filePerms')
 const { secondsToTimestamp } = require('../utils/index')
 const { writeMetadataFile } = require('../utils/ffmpegHelpers')
+const toneHelpers = require('../utils/toneHelpers')
 
 class AudioMetadataMangaer {
   constructor(db, emitter, clientEmitter) {
@@ -13,7 +14,104 @@ class AudioMetadataMangaer {
     this.clientEmitter = clientEmitter
   }
 
-  async updateAudioFileMetadataForItem(user, libraryItem) {
+  updateMetadataForItem(user, libraryItem, useTone = true) {
+    if (useTone) {
+      this.updateMetadataForItemWithTone(user, libraryItem)
+    } else {
+      this.updateMetadataForItemWithFfmpeg(user, libraryItem)
+    }
+  }
+
+  //
+  // TONE
+  //
+  getToneMetadataObjectForApi(libraryItem) {
+    return toneHelpers.getToneMetadataObject(libraryItem)
+  }
+
+  async updateMetadataForItemWithTone(user, libraryItem) {
+    var audioFiles = libraryItem.media.includedAudioFiles
+
+    const itemAudioMetadataPayload = {
+      userId: user.id,
+      libraryItemId: libraryItem.id,
+      startedAt: Date.now(),
+      audioFiles: audioFiles.map(af => ({ index: af.index, ino: af.ino, filename: af.metadata.filename }))
+    }
+
+    this.emitter('audio_metadata_started', itemAudioMetadataPayload)
+
+    // Write chapters file
+    var chaptersFilePath = null
+    var cachePath = Path.join(global.MetadataPath, 'cache/items')
+    console.log('Items Cache Path', cachePath)
+
+    var itemCacheDir = Path.join(cachePath, libraryItem.id)
+    await fs.ensureDir(itemCacheDir)
+
+    if (libraryItem.media.chapters.length) {
+      chaptersFilePath = Path.join(itemCacheDir, 'chapters.txt')
+      try {
+        await toneHelpers.writeToneChaptersFile(libraryItem.media.chapters, chaptersFilePath)
+      } catch (error) {
+        Logger.error(`[AudioMetadataManager] Write chapters.txt failed`, error)
+        chaptersFilePath = null
+      }
+    }
+
+    const toneMetadataObject = toneHelpers.getToneMetadataObject(libraryItem, chaptersFilePath)
+    Logger.debug(`[AudioMetadataManager] Book "${libraryItem.media.metadata.title}" tone metadata object=`, toneMetadataObject)
+
+    const results = []
+    for (const af of audioFiles) {
+      const result = await this.updateAudioFileMetadataWithTone(libraryItem.id, af, toneMetadataObject, itemCacheDir)
+      results.push(result)
+    }
+
+    const elapsed = Date.now() - itemAudioMetadataPayload.startedAt
+    Logger.debug(`[AudioMetadataManager] Elapsed ${secondsToTimestamp(elapsed)}`)
+    itemAudioMetadataPayload.results = results
+    itemAudioMetadataPayload.elapsed = elapsed
+    itemAudioMetadataPayload.finishedAt = Date.now()
+    this.emitter('audio_metadata_finished', itemAudioMetadataPayload)
+  }
+
+  async updateAudioFileMetadataWithTone(libraryItemId, audioFile, toneMetadataObject, itemCacheDir) {
+    const resultPayload = {
+      libraryItemId,
+      index: audioFile.index,
+      ino: audioFile.ino,
+      filename: audioFile.metadata.filename
+    }
+    this.emitter('audiofile_metadata_started', resultPayload)
+
+    // Backup audio file
+    try {
+      const backupFilePath = Path.join(itemCacheDir, audioFile.metadata.filename)
+      await fs.copy(audioFile.metadata.path, backupFilePath)
+      Logger.debug(`[AudioMetadataManager] Backed up audio file at "${backupFilePath}"`)
+    } catch (err) {
+      Logger.error(`[AudioMetadataManager] Failed to backup audio file "${audioFile.metadata.path}"`, err)
+    }
+
+    const _toneMetadataObject = {
+      ...toneMetadataObject,
+      'TrackNumber': audioFile.index
+    }
+
+    resultPayload.success = await toneHelpers.tagAudioFile(audioFile.metadata.path, _toneMetadataObject)
+    if (resultPayload.success) {
+      Logger.info(`[AudioMetadataManager] Successfully tagged audio file "${audioFile.metadata.path}"`)
+    }
+
+    this.emitter('audiofile_metadata_finished', resultPayload)
+    return resultPayload
+  }
+
+  //
+  // FFMPEG
+  //
+  async updateMetadataForItemWithFfmpeg(user, libraryItem) {
     var audioFiles = libraryItem.media.audioFiles
 
     const itemAudioMetadataPayload = {
@@ -36,9 +134,8 @@ class AudioMetadataMangaer {
       var coverPath = libraryItem.media.coverPath.replace(/\\/g, '/')
     }
 
-    // TODO: Split into batches
     const proms = audioFiles.map(af => {
-      return this.updateAudioFileMetadata(libraryItem.id, af, outputDir, metadataFilePath, coverPath)
+      return this.updateAudioFileMetadataWithFfmpeg(libraryItem.id, af, outputDir, metadataFilePath, coverPath)
     })
 
     const results = await Promise.all(proms)
@@ -55,7 +152,7 @@ class AudioMetadataMangaer {
     this.emitter('audio_metadata_finished', itemAudioMetadataPayload)
   }
 
-  updateAudioFileMetadata(libraryItemId, audioFile, outputDir, metadataFilePath, coverPath = '') {
+  updateAudioFileMetadataWithFfmpeg(libraryItemId, audioFile, outputDir, metadataFilePath, coverPath = '') {
     return new Promise((resolve) => {
       const resultPayload = {
         libraryItemId,
diff --git a/server/managers/CacheManager.js b/server/managers/CacheManager.js
index 1c5f881b..dccd8faa 100644
--- a/server/managers/CacheManager.js
+++ b/server/managers/CacheManager.js
@@ -10,6 +10,7 @@ class CacheManager {
     this.CachePath = Path.join(global.MetadataPath, 'cache')
     this.CoverCachePath = Path.join(this.CachePath, 'covers')
     this.ImageCachePath = Path.join(this.CachePath, 'images')
+    this.ItemCachePath = Path.join(this.CachePath, 'items')
   }
 
   async ensureCachePaths() { // Creates cache paths if necessary and sets owner and permissions
@@ -29,6 +30,11 @@ class CacheManager {
       pathsCreated = true
     }
 
+    if (!(await fs.pathExists(this.ItemCachePath))) {
+      await fs.mkdir(this.ItemCachePath)
+      pathsCreated = true
+    }
+
     if (pathsCreated) {
       await filePerms.setDefault(this.CachePath)
     }
diff --git a/server/objects/mediaTypes/Book.js b/server/objects/mediaTypes/Book.js
index cb14292f..6762173a 100644
--- a/server/objects/mediaTypes/Book.js
+++ b/server/objects/mediaTypes/Book.js
@@ -3,7 +3,7 @@ const Logger = require('../../Logger')
 const BookMetadata = require('../metadata/BookMetadata')
 const { areEquivalent, copyValue, cleanStringForSearch } = require('../../utils/index')
 const { parseOpfMetadataXML } = require('../../utils/parsers/parseOpfMetadata')
-const { overdriveMediaMarkersExist, parseOverdriveMediaMarkersAsChapters } = require('../../utils/parsers/parseOverdriveMediaMarkers')
+const { parseOverdriveMediaMarkersAsChapters } = require('../../utils/parsers/parseOverdriveMediaMarkers')
 const abmetadataGenerator = require('../../utils/abmetadataGenerator')
 const { readTextFile } = require('../../utils/fileUtils')
 const AudioFile = require('../files/AudioFile')
@@ -111,12 +111,15 @@ class Book {
   get invalidAudioFiles() {
     return this.audioFiles.filter(af => af.invalid)
   }
+  get includedAudioFiles() {
+    return this.audioFiles.filter(af => !af.exclude && !af.invalid)
+  }
   get hasIssues() {
     return this.missingParts.length || this.invalidAudioFiles.length
   }
   get tracks() {
     var startOffset = 0
-    return this.audioFiles.filter(af => !af.exclude && !af.invalid).map((af) => {
+    return this.includedAudioFiles.map((af) => {
       var audioTrack = new AudioTrack()
       audioTrack.setData(this.libraryItemId, af, startOffset)
       startOffset += audioTrack.duration
diff --git a/server/objects/metadata/BookMetadata.js b/server/objects/metadata/BookMetadata.js
index bd8dfe64..d07c2e6d 100644
--- a/server/objects/metadata/BookMetadata.js
+++ b/server/objects/metadata/BookMetadata.js
@@ -133,6 +133,14 @@ class BookMetadata {
       return `${getTitleIgnorePrefix(se.name)} #${se.sequence}`
     }).join(', ')
   }
+  get firstSeriesName() {
+    if (!this.series.length) return ''
+    return this.series[0].name
+  }
+  get firstSeriesSequence() {
+    if (!this.series.length) return ''
+    return this.series[0].sequence
+  }
   get narratorName() {
     return this.narrators.join(', ')
   }
diff --git a/server/routers/ApiRouter.js b/server/routers/ApiRouter.js
index a689db36..d7ad0c07 100644
--- a/server/routers/ApiRouter.js
+++ b/server/routers/ApiRouter.js
@@ -95,6 +95,7 @@ class ApiRouter {
     this.router.post('/items/:id/play/:episodeId', LibraryItemController.middleware.bind(this), LibraryItemController.startEpisodePlaybackSession.bind(this))
     this.router.patch('/items/:id/tracks', LibraryItemController.middleware.bind(this), LibraryItemController.updateTracks.bind(this))
     this.router.get('/items/:id/scan', LibraryItemController.middleware.bind(this), LibraryItemController.scan.bind(this))
+    this.router.get('/items/:id/tone-object', LibraryItemController.middleware.bind(this), LibraryItemController.getToneMetadataObject.bind(this))
     this.router.get('/items/:id/audio-metadata', LibraryItemController.middleware.bind(this), LibraryItemController.updateAudioFileMetadata.bind(this))
     this.router.post('/items/:id/chapters', LibraryItemController.middleware.bind(this), LibraryItemController.updateMediaChapters.bind(this))
     this.router.post('/items/:id/open-feed', LibraryItemController.middleware.bind(this), LibraryItemController.openRSSFeed.bind(this))
diff --git a/server/utils/index.js b/server/utils/index.js
index 9b2cd23b..48474c8b 100644
--- a/server/utils/index.js
+++ b/server/utils/index.js
@@ -80,7 +80,7 @@ function elapsedPretty(seconds) {
 }
 module.exports.elapsedPretty = elapsedPretty
 
-function secondsToTimestamp(seconds, includeMs = false) {
+function secondsToTimestamp(seconds, includeMs = false, alwaysIncludeHours = false) {
   var _seconds = seconds
   var _minutes = Math.floor(seconds / 60)
   _seconds -= _minutes * 60
@@ -91,6 +91,9 @@ function secondsToTimestamp(seconds, includeMs = false) {
   _seconds = Math.floor(_seconds)
 
   var msString = '.' + (includeMs ? ms.toFixed(3) : '0.0').split('.')[1]
+  if (alwaysIncludeHours) {
+    return `${_hours.toString().padStart(2, '0')}:${_minutes.toString().padStart(2, '0')}:${_seconds.toString().padStart(2, '0')}${msString}`
+  }
   if (!_hours) {
     return `${_minutes}:${_seconds.toString().padStart(2, '0')}${msString}`
   }
diff --git a/server/utils/prober.js b/server/utils/prober.js
index 8b235f9b..4009b26a 100644
--- a/server/utils/prober.js
+++ b/server/utils/prober.js
@@ -177,8 +177,8 @@ function parseTags(format, verbose) {
     file_tag_comment: tryGrabTags(format, 'comment', 'comm', 'com'),
     file_tag_description: tryGrabTags(format, 'description', 'desc'),
     file_tag_genre: tryGrabTags(format, 'genre', 'tcon', 'tco'),
-    file_tag_series: tryGrabTags(format, 'series', 'show'),
-    file_tag_seriespart: tryGrabTags(format, 'series-part', 'episode_id'),
+    file_tag_series: tryGrabTags(format, 'series', 'show', 'mvin'),
+    file_tag_seriespart: tryGrabTags(format, 'series-part', 'episode_id', 'mvnm'),
     file_tag_isbn: tryGrabTags(format, 'isbn'),
     file_tag_language: tryGrabTags(format, 'language', 'lang'),
     file_tag_asin: tryGrabTags(format, 'asin'),
diff --git a/server/utils/toneHelpers.js b/server/utils/toneHelpers.js
new file mode 100644
index 00000000..fc88c169
--- /dev/null
+++ b/server/utils/toneHelpers.js
@@ -0,0 +1,87 @@
+const tone = require('node-tone')
+const fs = require('../libs/fsExtra')
+const Logger = require('../Logger')
+const { secondsToTimestamp } = require('./index')
+
+module.exports.writeToneChaptersFile = (chapters, filePath) => {
+  var chaptersTxt = ''
+  for (const chapter of chapters) {
+    chaptersTxt += `${secondsToTimestamp(chapter.start, true, true)} ${chapter.title}\n`
+  }
+  return fs.writeFile(filePath, chaptersTxt)
+}
+
+module.exports.getToneMetadataObject = (libraryItem, chaptersFile) => {
+  const coverPath = libraryItem.media.coverPath
+  const bookMetadata = libraryItem.media.metadata
+
+  const metadataObject = {
+    'Title': bookMetadata.title || '',
+    'Album': bookMetadata.title || '',
+    'TrackTotal': libraryItem.media.tracks.length
+  }
+  const additionalFields = []
+
+  if (bookMetadata.subtitle) {
+    metadataObject['Subtitle'] = bookMetadata.subtitle
+  }
+  if (bookMetadata.authorName) {
+    metadataObject['Artist'] = bookMetadata.authorName
+    metadataObject['AlbumArtist'] = bookMetadata.authorName
+  }
+  if (bookMetadata.description) {
+    metadataObject['Comment'] = bookMetadata.description
+    metadataObject['Description'] = bookMetadata.description
+  }
+  if (bookMetadata.narratorName) {
+    metadataObject['Narrator'] = bookMetadata.narratorName
+    metadataObject['Composer'] = bookMetadata.narratorName
+  }
+  if (bookMetadata.firstSeriesName) {
+    metadataObject['MovementName'] = bookMetadata.firstSeriesName
+  }
+  if (bookMetadata.firstSeriesSequence) {
+    metadataObject['Movement'] = bookMetadata.firstSeriesSequence
+  }
+  if (bookMetadata.genres.length) {
+    metadataObject['Genre'] = bookMetadata.genres.join('/')
+  }
+  if (bookMetadata.publisher) {
+    metadataObject['Publisher'] = bookMetadata.publisher
+  }
+  if (bookMetadata.asin) {
+    additionalFields.push(`ASIN=${bookMetadata.asin}`)
+  }
+  if (bookMetadata.isbn) {
+    additionalFields.push(`ISBN=${bookMetadata.isbn}`)
+  }
+  if (coverPath) {
+    metadataObject['CoverFile'] = coverPath
+  }
+  if (parsePublishedYear(bookMetadata.publishedYear)) {
+    metadataObject['PublishingDate'] = parsePublishedYear(bookMetadata.publishedYear)
+  }
+  if (chaptersFile) {
+    metadataObject['ChaptersFile'] = chaptersFile
+  }
+
+  if (additionalFields.length) {
+    metadataObject['AdditionalFields'] = additionalFields
+  }
+
+  return metadataObject
+}
+
+module.exports.tagAudioFile = (filePath, payload) => {
+  return tone.tag(filePath, payload).then((data) => {
+    return true
+  }).catch((error) => {
+    Logger.error(`[toneHelpers] tagAudioFile: Failed for "${filePath}"`, error)
+    return false
+  })
+}
+
+function parsePublishedYear(publishedYear) {
+  if (isNaN(publishedYear) || !publishedYear || Number(publishedYear) <= 0) return null
+  return `01/01/${publishedYear}`
+}
\ No newline at end of file