The ISBN (International Standard Book Number) is a 10- or 13-digit number located on the back of the book next to the barcode. If a sticker has been placed over the barcode, you can also find it on the title page or the copyright page. Each book (and each edition of that book) will have a unique ISBN number.
Modified on: Tue, Apr 7, 2015 at 2:23 PM
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