Hey Authors and Playwrights,
If you’re just stepping into the publishing world, you’ve probably heard the term ISBN thrown around - but what is it, and do you really need one? Here’s a simple breakdown.
What is an ISBN?
An ISBN (International Standard Book Number) is a unique 13-digit identifier used worldwide to track and catalogue your book. Think of it as your book’s digital fingerprint. No two are the same.
Why ISBNs Matter
Distribution: Retailers, libraries, and wholesalers rely on ISBNs to order and track books.
Professionalism: Having one signals your book is part of the formal book-publishing ecosystem.
Metadata: ISBNs connect to all the important book info. Title, author, format, edition, publisher, and more.
One Book = Multiple ISBNs
Each format gets its own ISBN:
Paperback
Hardcover
eBook (some platforms don’t require their own, but professionally it’s best practice)
Audiobook
If the format changes, or you release a new edition, you’ll need a new ISBN.
ISBN vs. Barcode
They are not the same.
An ISBN is the number.
A barcode is a visual representation of that number used by retail scanners.
Some services include both; others don’t.
Who Provides ISBNs?
Every country has its own agency.
Australia: Thorpe-Bowker (myidentifiers.com.au)
US: Bowker (myidentifiers.com)
UK: Nielsen
Self-publishing platforms like KDP and IngramSpark can provide free ISBNs, but there are pros and cons.
Should You Use a Free ISBN?
Pros:
Saves money (ISBNs can be expensive).
Easy and instant.
Cons:
The platform becomes the “publisher of record.”
Harder to switch distributors later.
Limits how “independent” your imprint appears.
Most authors aiming for a professional indie career prefer to buy and own their ISBNs so the publishing identity stays with them.
ISBNs Don’t Affect Copyright
Owning an ISBN doesn’t give you copyright.
Copyright is automatically yours when you create the work.
The ISBN is strictly for identification and distribution.
Bottom Line
If you plan to publish multiple books, build an author brand, or distribute beyond one platform, owning your ISBNs gives you control and flexibility. But if you’re testing the waters or distributing only through Amazon, a free ISBN is totally fine.
I hope you found this information useful - Happy writing!