What is an ISBN and how do I obtain one?

The ISBN (International Standard Book Number) is a unique 13-digit number that identifies one title, or edition of a title, from one specific publisher and is unique to that edition.  R.R. Bowker, the official ISBN
Agency for the United States, is responsible for the assignment of the ISBN Publisher Prefix to those publishers with a residence or office in the U.S. The U.S. ISBN Agency cannot assign ISBNs to publishers and self-publishers located outside the United States and its territories.

To order an ISBN, visit the product identifiers page from the RR Bowker web site: http://www.bowker.com/index.php/identifier-services/book-title-identifie...