


An ISBN is a 13-digit identifier that retailers, distributors and libraries use to list and order your book. Without one, your book can't move through the trade.
You need one ISBN per format. Paperback, hardcover, ebook and audiobook each get their own. A 10-pack is usually cheaper per ISBN than buying one at a time, and leaves you ready for future editions.
| Detail | Free KDP ISBN | Your own ISBN |
|---|---|---|
| Publisher of record | Independently published | You or your imprint |
| Usable outside Amazon | No | Yes: IngramSpark, Barnes and Noble, libraries |
| Control over metadata | Limited | Full |
| Cost | Free | From $125 at Bowker |
Selling only on Amazon? A free ISBN can be enough. For bookstores, libraries or wide distribution, you need your own.
Your book is already copyrighted. Copyright exists the moment your work is written down. Registration doesn't create it. Registration makes it enforceable.
For U.S. works, registration is required before you can file an infringement lawsuit.
Register before infringement, or within three months of publication, and you can claim statutory damages and attorney's fees without proving lost income.
Your ownership is documented with a date, which strengthens your position in any dispute.
We choose the right application type for your work, prepare it, upload your deposit copy, and track the claim until the certificate arrives. Processing can take several months, but your registration's effective date is the day the Copyright Office receives a complete application.
An LCCN helps libraries catalog your book. Self-published authors can apply through the Library of Congress PrePub Book Link program, but only before publication. If your timeline allows, we include it in the package.
We confirm your formats, distribution plans, and whether you want your own imprint.
We help you choose an imprint name. It becomes the publisher name on every ISBN record.
ISBNs are bought in your name and assigned to each format.
Title, author, description and format details go into Bowker's database.
Print-ready barcode files for each print edition.
Application prepared, submitted, and tracked to certificate.
You get your Bowker account access, barcode files, filing confirmation and copyright page text.
Our service fee plus government fees, passed through at cost with no markup.
| Package | Includes | Service fee |
|---|---|---|
| ISBN only | 1 ISBN, barcode, metadata | Custom quote |
| ISBN bundle | 10 ISBNs, barcodes, metadata | Custom quote |
| Copyright only | Application preparation and filing | Custom quote |
| Complete package | ISBNs, copyright filing and LCCN | Custom quote |
ISBN agencies are national. UK authors get ISBNs from Nielsen, and Canadian authors can get them free through Library and Archives Canada. The UK has no copyright registration system because protection is automatic. We'll tell you what applies in your country before you pay anything.
No. Each format needs its own ISBN.
Not on Amazon KDP, which uses its own ASIN. Some other ebook retailers do require one.
You do. It's registered in your name or your imprint's name, and you get access to the Bowker account.
Yes. Registering within three months of publication keeps your right to statutory damages and attorney's fees for infringement that happens before the registration.
Not for a standard book registration. If ownership is disputed, the book has co-authors, or it was a work made for hire, talk to an attorney.
No. We provide registration services, not legal counsel.

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