How to build your own audiobook library

Short answer: buy DRM-free where you can, borrow from LibriVox and your library for the rest, store everything as M4B in one folder, and let an app narrate the books that were never recorded.

Three kinds of audio, one shelf

A useful audiobook library mixes three things, and the trick is having one app that treats them the same way:

1. Recorded audiobooks you own, as files on your device.
2. Books that ship with narration, which in ebook terms means EPUB3 with Media Overlays: the text and a professional recording, synchronised sentence by sentence.
3. Everything else, narrated by the app. On-device text-to-speech has got good enough that an unrecorded book is no longer a book you can’t listen to.

Where to get audiobooks you actually keep

• LibriVox. Volunteers reading public-domain books, free, no account, downloadable as MP3 or M4B. Quality varies by reader, so sample a chapter first. It is the single largest source of audiobooks you can simply have.
• DRM-free shops. Several stores sell audiobooks as plain files rather than as an entry in an account. Libro.fm and Downpour are the best known; many publishers also sell directly, especially in non-fiction and technical publishing.
• Your public library. Borrowing apps stream to you rather than hand you files, so this isn’t ownership. It is still the best value in audiobooks and worth using alongside the rest.
• Discs you already own. Ripping an audiobook CD you bought is legal in many countries for personal use, and illegal in some. Check your local rules; we go through the general landscape in ebook DRM explained.

A subscription is not a library. It is a rental with a good catalogue, and it belongs in your listening life the same way a streaming service does: useful, temporary, not a shelf.

Use M4B, not a pile of MP3s

An M4B is a single audio file with chapter markers built in. That one detail solves nearly every annoyance in audiobook playback: the book stays one item in your library, chapters are navigable, and the playback position belongs to the book instead of to whichever MP3 you happened to be in when the phone rang.

A folder of forty MP3s technically works. In practice files get sorted alphabetically instead of numerically, one track goes missing, and resuming after a week is a guessing game. If a purchase arrives as MP3s, converting is worth the ten minutes.

Converting, briefly

On a desktop, ffmpeg can concatenate MP3s and write chapter marks; m4b-tool wraps that in something friendlier, and there are graphical converters on every platform. Whichever you use, do three things: keep the original bitrate rather than re-encoding twice, write chapter names from the track titles, and embed the cover.

Organise once, benefit for years

The structure that keeps working:

• One Audiobooks folder, next to your ebooks.
• Inside it, one folder per book: Author - Title/.
• Inside that, the M4B and a cover.jpg.
• Correct title, author and narrator in the file’s metadata, because that is what apps read.

Keep the folder in Drive, Dropbox, OneDrive or Nextcloud and it is backed up and available on every device without any vendor library in between. The same reasoning applies to ebooks: see how to organise a digital library.

Fill the gaps with narration

Most books were never recorded. Older non-fiction, translated work, technical books, self-published fiction: no audiobook exists and none is coming. That used to be the end of the conversation.

On-device neural voices changed it. Lectern narrates any EPUB, PDF, MOBI or FB2 with Piper or Kokoro running on the phone itself, highlights the sentence being read so you can follow along, and keeps your position whether you were reading or listening. It also plays your own M4B and MP3 files linked to the matching book, and supports EPUB3 Media Overlays where a publisher shipped real narration. One shelf, three kinds of audio, no account.

Add a sleep timer and it covers the listening most people actually do: commuting, cooking, and twenty minutes before sleep.

A weekend’s work, then it maintains itself

1. Make the Audiobooks folder in the cloud storage you already pay for.
2. Move in everything you already own, one folder per book.
3. Convert loose MP3 sets to M4B as you go, not all at once.
4. Download five LibriVox recordings of books you’ve been meaning to read.
5. Point your reading app at the folder and let it narrate everything else.

After that the library grows by one folder at a time, and nothing you add can be taken back.

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