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: Most authors should consider at least a 10-pack, as a unique ISBN is required for every format of a book (e.g., one for paperback, one for hardcover, and often one for ebook). 2. The Purchasing Process ISBN US - Bowker

For authors in the United States, is the only official agency authorized to issue International Standard Book Numbers (ISBNs). Purchasing through their retail site, MyIdentifiers.com , establishes you as the "publisher of record," giving you full control over your book's metadata and distribution. 1. Pricing and Bundles buying isbn numbers bowker

Buying in bulk significantly reduces the per-unit cost. Prices current as of April 2026 are: : $125 10-Pack : $295 ($29.50 each) 100-Pack : $575 ($5.75 each) 1,000-Pack : $1,500 ($1.50 each) : Most authors should consider at least a