WHAT IS AN ISBN?
The International Standard Book Number (ISBN) is a 13-digit number that uniquely identifies books and book-like products published internationally.
WHY BUY AN ISBN?
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.
I have my own 10-digit ISBN number. Can I use that?
If your 10-digit number has not previously been used for a print or digital book, yes. However, you need to convert it to a 13-digit number by using a convertor, such as the one available at www.isbn.org/converterpub.asp