An ISBN (International Standard Book Number) is a unique identifier for books. It's a 13-digit number that helps libraries, bookstores, and readers identify and order books. Every edition and format of a book needs its own ISBN.

While not legally required in all countries, an ISBN is highly recommended for professional book publishing. Most bookstores, libraries, and online retailers require ISBNs to list and sell books. It's essential for distribution and marketing.

Yes! When you work with Clarinbridge Publishing, you retain 100% of your book's royalties. We only charge for the ISBN service - we don't take any percentage of your book sales or royalties.

No, there are no recurring charges. Our pricing is a one-time fee for the ISBN service. Once you pay, the ISBN is yours permanently with no ongoing fees or subscriptions.

Different formats of the same book require separate ISBNs. For example, if you publish your book as a hardcover, paperback, e-book, and audiobook, each format needs its own ISBN. This helps retailers and libraries properly catalog and sell your book in its various formats.

Clarinbridge Publishing will be listed as the publisher of record for your ISBN. This is standard practice and ensures your ISBN is properly registered and recognized by booksellers and distributors worldwide.

Yes! Our ISBNs are internationally recognized and can be used on all major platforms including Amazon KDP, Barnes & Noble, Lulu, PublishDrive, and other major retailers and distributors worldwide.