How do I find the ISBN for a book?
The ISBN (International Standard Book Number) is a unique, commercial book identifier. ISBNs come in 10-digit and 13-digit formats. The 13-digit codes were introduced in 2007 and so most new books will have this 13-digit code that begins with the digits 978.
Typically, you should be able to find this number on the CIP (Cataloging in Progress) page of the book which is often found directly after the title page. You can also find this information on the back cover of a book usually within or on top of a barcode. Books that are copyrighted before the 1970s will likely not have an ISBN number. Consult Worldcat.org to locate books in library catalogs around the world and to view associated ISBN numbers.