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.
Library and Archives Canada provides ISBNs free of charge to Canadian citizens. Cost Comparison: Single vs. Blocks (US Prices) 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 Buying International Standard Book Number (ISBN) blocks is
Bowker (MyIdentifiers.com) is the only official agency. and audiobook—requires its own unique ISBN