What is an ISBN?

ISBN stands for International Standard Book Number. Every book is assigned a unique ISBN-10 and ISBN-13 when published.
The ISBN number can be found on the back cover of a book, next to the barcode. If a book doesn't show the ISBN on the back cover, look on the page featuring the copyright and publisher information and the ISBN will be found there.
An ISBN is assigned to each separate edition and variation (except reprintings) of a publication. For example, an e-book, a paperback and a hardcover edition of the same book will each have a different ISBN.
You can search for an ISBN of a title in our catalogue. It is the most accurate way to ensure that you find the correct edition. If you know the ISBN of the title you're looking for, type it into the search box (at the top of our site) if the title is on our site, it'll appear in your search results.
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