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ISBN Lookup

Use our ISBN search to find book information and the best prices from various online bookstores.

What is an ISBN?

ISBN(International Standard Book Number) is a 10 or 13-digit unique identifier for books found on the back cover or copyright page. 1970-2007 each published book has a 10-digit ISBN format of 9-digit numeric + [1-digit numeric or character "X" check digit], for example, 0-936385-405, 0-8044-2957-X.
FYI "X" actually means "10" In ISBN, and you, as a book buyer, could ignore all the hyphens "-".

On Jan 1, 2007, they began the changeover to 13 digits. ISBN 13 begin with "978" or "979", for instance, "9780804429573". If you find both 10 and 13-digit ISBN on the book cover, don’t worry, both are valid to use.

Why search by ISBN?

An ISBN refers to a specific edition of books. Searching by ISBN, you will get the correct book edition, paperback or hardcover, large or regular print, printed country, language, e-book, audiobook, or paper book. For instance, a student should use ISBN to find the correct edition of textbooks.