ISBN’s full form is International Standard Book Number. An ISBN is a unique number given to every book around the world. The ISBN is an identifier and does not convey any form of legal or copyright protection.
Since 1 January 2007 ISBNs always consist of 13 digits. ISBNs were 10 digits in length up to the end of December 2006.
The ISBN identifies the registrant as well as the format, edition, and specific title.
On most books, the ISBN number can be found on the back cover, next to the barcode.
An ISBN is essentially a product identifier used by libraries, internet retailers, booksellers, publishers, and other supply chain participants for stock control, listing, sales records, and ordering purposes.