Buying Isbn Blocks -

Official pricing from Bowker rewards bulk purchasing, with the price per ISBN dropping by over 75% when moving from a single unit to a block of 10. Buy ISBNs | Bowker | Identifier Services

Bowker (MyIdentifiers.com) is the only official agency. buying isbn blocks

ISBNs must be purchased from the official agency in the country where your publishing business is physically located. Official pricing from Bowker rewards bulk purchasing, with

Nielsen Book Services handles registration. Nielsen Book Services handles registration

Library and Archives Canada provides ISBNs free of charge to Canadian citizens. Cost Comparison: Single vs. Blocks (US Prices)

Buying International Standard Book Number (ISBN) blocks is a strategic move for authors and publishers who plan to release multiple book formats or future titles. Because every distinct format of a book—such as paperback, hardcover, and audiobook—requires its own unique ISBN, purchasing in bulk significantly reduces the cost per unit.

Thorpe-Bowker serves these regions.