Every Book Affiliate Program, Ranked by Commission

The rate is the least interesting column

Four things move your actual earnings more than the percentage does:

• Whether it pays on the whole cart. Amazon pays commission on everything a reader buys in that session, not just your book. No other program on this list does that, and it regularly closes the gap with the 10% programs on its own.
• Conversion rate. Amazon has saved cards and one-click checkout. A 10% commission on a sale that never completes is worth less than 4.5% on one that does.
• Where your audience lives. Bookshop.org is effectively US-first. Blackwell's is UK-focused. If your audience is in the wrong country, the rate is irrelevant.
• What format they want. A print link earns nothing from the person who wanted the audiobook. Libro.fm exists precisely for that reader, and its membership bounty is the highest single payout on this list.

Programs worth adding beyond the obvious two

Libro.fm — the most underrated on this list

10% on audiobooks and credit bundles, plus a 30% one-time commission on each new monthly membership and a flat payment on annual ones. A 30-day window, far more generous than anything else here. If any part of your audience listens rather than reads, and you're only posting print links, you're leaving the highest-value conversion on this page unclaimed.

It also carries the same indie-bookstore support message as Bookshop, and "an alternative to Audible" is a framing that lands well with book audiences.

The used market — where the rate understates the value

Biblio, AbeBooks, Alibris, ThriftBooks and BetterWorld pay mid-single digits, which looks unexciting next to 10%. The reason to carry them isn't the rate — it's that they convert a reader who was never going to buy at all.

Someone who bounces off a $28 hardcover earns you nothing. That same reader will happily buy the $6 used copy. Heavy readers — the people most likely to follow a book creator — are exactly the audience that buys used. A commission on a sale that otherwise wouldn't have happened beats a higher rate on a sale you lost.

eBay — narrow but high-value

1–4% is the weakest rate here and the inventory is unpredictable. It earns its place only for signed copies, first editions and out-of-print collectibles, where order values are high enough that the percentage stops mattering. Not worth setting up unless your audience collects.

Two rules that outrank the whole table

Never advertise a price you didn't pull live

Amazon's Operating Agreement requires that any price you display come from real-time Product Advertising API data. Writing "only $14.99!" in a post and leaving it there is a violation the moment the price changes — and account closures over this are not rare. If you're not pulling live data, don't quote prices at all.

Disclose, always

Affiliate disclosure is legally required in most jurisdictions and every program on this list mandates it. It also costs you almost nothing: audiences that trust you keep clicking, and the ones who'd be annoyed to discover it later are the ones you can least afford to lose.

What to actually do

1. Sign up for Amazon Associates and Bookshop.org first — they cover most of the volume.
2. Add Libro.fm if any part of your audience listens to audiobooks.
3. Add the used-book retailers if your audience is price-conscious or reads heavily.
4. Add Blackwell's if you have a significant UK audience.
5. Skip eBay unless you talk about collectible editions.
6. Offer them together on one page, so the reader's preference decides rather than yours.