U.S ISBN Agency - Welcome to the U.S. ISBN Agency, the official source for ISBNs in the United States.

An ISBN is a number that uniquely identifies your title.

An ISBN is required if you want to sell your book in bookstores and place it in libraries.

Please use the US ISBN Agency’s website www.myidentifiers.com to get an ISBN instantly.

Standard Address Number (SAN) information and purchase.

Instantly generate a barcode for your ISBN!

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