ISBN - Wikipedia
The International Standard Book Number (ISBN) is a numeric commercial book identifier that is intended to be unique. [a][b] …
ISBN US - R. R. Bowker
The most important identifier your book can have is the ISBN. As the U.S. ISBN Agency, Bowker is the ONLY official source of …
ISBN Search
Find books easily using ISBN, title, or author searches. Search using ISBN-10 or ISBN-13.
Bowker | Identifier Services
My Identifiers is the only official website of the U.S. ISBN Agency. We provide you with the products and services to make your …
What Is an ISBN and Why Does Your Book Need One?
That's the International Standard Book Number, or ISBN —a unique 13-digit code that’s basically your book’s fingerprint. It's the …
What Is an ISBN? Everything Authors Need to Know [2026] | Books.by
ISBN (International Standard Book Number) is a unique 13-digit identifier assigned to each edition of a book. It's how bookstores, …
Home | ISBN.org
An ISBN uniquely identifies your book, and facilitates the sale of your book to bookstores (physical and digital) and libraries. Using …
The World's Largest Book Database - ISBN Database | ISBNdb
The ISBNdb book database includes over 31 million unique ISBNs with up to 19 data points per book and is searchable via API. …
Buy ISBNs | Bowker | Identifier Services
The ISBN identifies the publisher as well as the specific book title, edition and format (hardback, paperback, ePub, PDF, Mobi, …
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 …