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Identifier Services - Purchase an ISBN online and manage your own bibliographic data instantly
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 to get an ISBN instantly.

Standard Address Number (SAN) information and purchase.
Instantly generate a barcode for your ISBN!
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Enable the unique identification of your textual works.