The International Standard Book Number (ISBN) is a 13-digit number that uniquely identifies books and book-like products published internationally.


ISBNs are the global standard for identifying titles. They are used world-wide as a unique identifier for books. They are used to simplify distribution and purchase of books throughout the global supply chain. Most retailers require this number to track book inventory.

Having an ISBN barcode on the back of your book that includes the book price allows bookstores to scan your book directly into their point of sale. If you’ve already published your book in physical form, you’ll need another ISBN for the electronic version.

When we register your book, it will become available and registered with the U.S. ISBN Agency, the industries largest bibliographic database that has over 3,000 subscribers. Over 1,800 library customers. Including branch libraries, which means over 5,000 different locations can access your data. Along with over 60 booksellers access your data. Barnes & Noble, Borders, and Amazon are among the major retail customers for Bowker's data.

For more information, please go to Bowker FAQ

I have my own 10-digit ISBN number. Can I use that?

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