ISBN Search

Using an ISBN is the most accurate and reliable way to search for a book. Use our search engine to find book information and the best prices for books. Typical location of an ISBN on the back of a book.


The most important identifier your book can have is the ISBN. As the U.S. ISBN Agency, Bowker is the ONLY official source of ISBNs in the United States. ISBNs provide unique identification for books and simplify the distribution of your books throughout the global supply chain.

What is an ISBN? International ISBN Agency

An ISBN is an International Standard Book Number. ISBNs were 10 digits in length up to the end of December 2006, but since 1 January 2007 they now always consist of 13 digits. ISBNs are calculated using a specific mathematical formula and include a check digit to validate the number.

Home – ISBN Perpustakaan Nasional Republik Indonesia

ISBN (International Standard Book Number) adalah deretan angka 13 digit sebagai pemberi identifikasi unik secara internasional terhadap satu buku maupun produk seperti buku yang diterbitkan oleh penerbit.

Buy ISBNs Bowker Identifier Services


The ISBN is a unique identifier for a book or other book-like product (such as an audiobook) that specifies its format, edition, and publisher. Why should I buy an ISBN? There are many reasons to purchase an ISBN for your title, including: An ISBN improves the likelihood your book will be found and purchased

Welcome to the U.S. ISBN Agency!

An ISBN uniquely identifies your book, and facilitates the sale of your book to bookstores (physical and digital) and libraries. Using ISBNs allows you to better manage your book’s metadata, and ensure maximum discoverability of your book.

ISBN Search – Search for Books by ISBN on AbeBooks

ISBN is the acronym for I nternational S tandard B ook N umber. This 10 or 13-digit number identifies a specific book, an edition of a book, or a book-like product (such as an audiobook). Since 1970 each published book has a unique ISBN. In 2007, assigned ISBNs changed from 10 digits to 13.

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