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Identifiers from Thorpe–Bowker — including ISBNs, barcodes, and SANs — make book marketing and distribution more efficient for booksellers, libraries, universities, and wholesalers.

ISBNs

Make your book easier to discover

ISBNs are the global standard for identifying books. They simplify book distribution, inventory tracking, and purchase, and improve the chances that a book will be found and sold. An ISBN identifies one specific version of a book; each version of a book, print or digital, requires its own ISBN.

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Barcodes

Make your print book easier to sell

Barcodes on printed books make them easier to sell – and they are required by most of the largest book retailers and wholesalers. When you get your barcodes from Bowker, the only official US ISBN Agency, you can be sure they meet the latest book publishing industry requirements.

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SAN

Eliminate shipping, billing, and payment errors

The SAN (Standard Address Number) is a unique seven-digit identifier used to signify a specific address of an organization. It facilitates purchase and distribution and reduces common problems such as billing errors, books shipped to the wrong points, and errors in payments and returns.

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