Which Book Should You Turn Into an Audiobook First? A Backlist and Series Guide

If you have several books, the first audiobook is a decision, not a default. The right pick is usually the book that already has readers, is not too long, and has a rights position you have checked.

Short answer: for a series, start with book one. For standalones, start with your best seller that suits listening and costs the least to produce. Then check rights, run break-even, and hear a sample before committing.

Should you start with your series opener or your best seller?

If they are the same book, the decision is easy. If not, start with the opener.

Each book in a series sells the next, so the first audiobook is also your listener funnel. A listener who starts at book three and hears references to events they missed is likely to leave. That is practical advice rather than data, so test it against your own readers' habits.

Your best-selling standalone is the other strong pick. Ebook and print sales are the honest signal that readers want the book. If the page edition doesn't sell, audio is a harder bet.

How do you rank your backlist?

Score each title on five questions. You can do it on paper in ten minutes.

Question	Why it matters
Does it already sell as an ebook or in print?	Existing readers are your first audience.
Does it suit listening?	Fiction, memoir, and story-led nonfiction work by ear.
How long is it?	Length drives cost and Audible's price band.
Do you hold the audio rights?	A rights problem stops a launch.
Is it the start of a series?	Book one sells the rest.

Books that lean on the page, like cookbooks or workbooks built around charts and images, lose too much in audio. Put those last.

How does length change the choice?

Audiobooks are produced and priced by finished hour, about 9,300 words each. Divide your word count by 9,300 to estimate it. Our guide to audiobook length by word count has worked examples.

Word count	Finished hours
50,000	about 5.4
75,000	about 8
100,000	about 10.8
120,000	about 13

A shorter book costs less on a per-hour route, and it finishes sooner. A 50,000-word title is about 5.4 hours, against about 13 for a 120,000-word epic. If two candidates sell equally well, the shorter one is a cheaper test of whether your readers want audio at all.

Lex packs include 10 finished hours: $49 for Voiceover and $99 for Scored. Hours past 10 are $5 an hour on Voiceover and $10 on Scored. A 120,000-word book on Scored is $99 plus 3 extra hours at $10, or $129. Human narration runs $200 to $400 per finished hour plus $75 to $150 for editing and mastering, which puts a 75,000-word novel at $2,400 to $5,850.

What is the break-even on each candidate?

Divide production cost by your average net per sale. Across the wide stores, a $14.99 audiobook nets about $6 a sale, so the arithmetic looks like this:

• Voiceover at $49 breaks even at about 9 sales.
• Scored at $99 breaks even at about 17 sales.
• Scored on a 120,000-word book at $129 breaks even at about 22 sales.
• A $3,000 human production breaks even at about 500 sales.

That is illustrative math, not a forecast. Use the audiobook cost and earnings calculator with your own numbers, and see our post on whether an audiobook is worth making for the full method.

Should you make the whole series at once?

You can, and you should run the same break-even on the bundle. Add the production cost of every book, then divide by the net on the bundle price. A bundle priced higher than a single title can pay back in fewer sales than the books would separately.

Start smaller if you are unsure. Make book one, watch listener response, then decide on the rest. A series also needs one voice across all books. Our post on voice consistency in AI audiobooks explains how consistency is kept from chapter to chapter, which matters when the books come out months apart.

Check these before you commit

1. Rights. Confirm you hold the audio rights for the title, as covered in our guide to who owns audiobook rights.
2. Pronunciation. Make a list of character names and invented terms. See our pronunciation guide.
3. Distribution. Decide between exclusive and wide. AI-narrated titles go wide, since ACX self-serve does not accept externally produced AI narration. Details are on our distribution page.
4. Audio-friendly structure. Tables, images, and footnotes may need a spoken substitute.

Test before you decide

The cheapest way to pick is to hear two candidates. Get a free sample of your first chapter, returned within 24 hours. Judge it by what a listener hears, not by the price.

Frequently asked questions

Which book should I make into an audiobook first?

Start with book one of a series, or with the standalone that already sells best and suits listening. Shorter books cost less to produce.

Should I make an audiobook of my first book or wait?

If the book already has readers and you hold the audio rights, there is little reason to wait. A $49 or $99 production pays back in a few dozen sales on the arithmetic above.

Can I do an audiobook for just one book in a series?

Yes. Make book one first and see how it does. Keep the same voice if you add the rest.

How much does a series cost to produce?

Add each book's cost. On Lex, Voiceover is $49 and Scored is $99 per book, each with 10 finished hours included. Human narration runs $200 to $400 per finished hour plus editing and mastering.

Does a longer book earn more?

Not on its own. Audible's price rises with runtime, but cost rises too. Run break-even on each title.