What is an ISBN/ISBN-13?
An ISBN is an International Standard Book Number. An ISBN is a ten- or thirteen-digit code used to identify a book. Each book has its own ISBN. You can find the ISBN on the back of a book near the barcode or on the copyright page. Always enter the ISBN without dashes and don’t leave off the leading zeros. Sometimes an ISBN can end with an X. In the example below, the ISBN-10 is 0072229691. The ISBN-13 is 978-0072229691.
