| What is an ISBN?
An ISBN is a 10 or 13 digit number that can be found on the back cover or inside the
front cover of almost all books.
You may enter the ISBN with or without the dashes, and don't leave off
the leading zeros. Sometimes an ISBN can end with an X.
Cash4Books.net will accept either the 10-digit or the 13-digit ISBN. Examples:
978-1-888799-97-2
1-888799-97-8
13-digit ISBN's should start with the numbers 978. Your book may have a 10-digit ISBN, or a 13-digit ISBN, or both (if your book has both, only enter the 13-digit number).
(Trouble finding the ISBN?)
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