Module 4 · Publishing Setup Without the Confusion
ISBNs: what KDP requires, and who owns them
What you'll understand: Understand what an ISBN is, when one is required, and what the ownership options are.
An ISBN is a number that identifies one edition of one book. Retailers, libraries and distributors use it to know exactly which object they're dealing with.
When KDP requires one
On Amazon KDP, ISBNs apply to print. A paperback or hardcover generally requires an ISBN (with some low-content exceptions), and each print format is a separate edition needing its own. A KDP eBook does not require an ISBN at all. A reprint with typo fixes doesn't need a new ISBN; a substantially revised edition does.
The ownership decision
- A free KDP ISBN
- For eligible print books, KDP can supply an ISBN at no cost. It is assigned for use with that KDP edition and isn't transferable to another publishing route.
- An ISBN you buy yourself
- Costs money, and lets you record your own name or imprint in the publisher field. It stays yours and can be used wherever you publish that edition.
Neither choice creates or changes your copyright, and neither determines how the book sells. What differs is whose name sits in the publisher field and how portable the identifier is. Authors who expect to publish several books, or who want their own imprint recorded, often buy their own. You do not need to have settled this before talking to anyone.
Why this matters
It's a small decision that's awkward to reverse: changing the ISBN on a published print edition later effectively means a new edition.
What to do with this information
Note which ISBN route you're leaning towards for print, or record that it's still open.
Quick check
No score, no pass mark — just a way to check the idea landed.
You're publishing a paperback and a KDP eBook. What does KDP require?
Add to my publishing plan
Anything you record here appears in your Publishing Action Plan.
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