What are ISBNs?

ISBNs are 10 or 13 digit codes identifying specific editions of a book. They’re sometimes written with hyphens. Examples: 0321543254, 0-321-54325-4, 9780321543257.

ISBN codes are usually listed on a book’s back cover, bar code, or copyright page.

Publish like a pro – buy your ISBN now!

Buy ISBN for your book

Advantages of Buying Your Own ISBN

Ownership & Professional Branding

  • With your own ISBN, the publisher name will show your name or your imprint, not “Amazon KDP” or any other platform.
  • This makes your book look more professional and industry-standard.

Freedom Across Platforms

  • Free ISBNs are usually locked to a single platform (e.g., Amazon’s free ISBN cannot be reused on Apple Books or IngramSpark).
  • A self-purchased ISBN can be used everywhere without restrictions.

Long-Term Sustainability

  • ISBNs never expire. Once assigned, you own it forever.
  • Owning your own ISBN protects you from platform policy changes or shutdowns.

Building Your Own Publishing Imprint

  • If you plan to publish more books in the future, buying ISBNs allows you to establish your own publishing house identity.
  • This builds trust and credibility with bookstores, libraries, and readers.

Easier Access to Libraries & Traditional Distribution

  • Many libraries and traditional bookstores require books to have an independent ISBN.
  • Free ISBNs from platforms often don’t meet this requirement.

How to Use an ISBN as an Independent Author

  • 1. Verify Your ISBN

    After purchase, you’ll receive a unique 13-digit ISBN. This number acts as the “passport” of your book.

  • 2. Assign the ISBN to Your Book

    Place the ISBN on the copyright page (verso of the title page).

  • 3. Use a Different ISBN for Each Format

    Hardcover, paperback, eBook (EPUB, PDF), audiobook — each format requires a separate ISBN. Different language editions also require different ISBNs.

  • 4. Register ISBN with Publishing Platforms

    When publishing via Amazon KDP, IngramSpark, Apple Books, Google Play Books, or local retailers, enter the ISBN in the metadata form. The system will recognize and display it as your official identifier.

  • 5. Generate a Barcode for Print

    Convert the ISBN into an EAN-13 barcode for the back cover of print books. Use ISBN agency tools or online generators, then embed it into your book cover design.

  • 6. Keep Records Safe

    Store your ISBN documentation and barcode files. Once an ISBN is assigned to a specific edition, it cannot be reused or reassigned.