ISBN Query Network

ISBN Check is a website dedicated to providing a lookup service for International Standard Book Numbers (ISBNs), allowing users to check the consistency of book numbers using a built-in checking system. The International Standard Book Number (ISBN) is an identifier for books and other non-periodic media, coordinated by the International Bureau of Book Numbers (IBBN), and is a 10-digit number standardized by ISO 2108 (13-digit as of 2007).