Direct answer
As checked in October 2026, the Nielsen UK ISBN Store lists one ISBN at £93 including VAT, a block of 10 at £174, 100 at £387 and 1,000 at £994. Prices can change, so verify the live Nielsen store before purchase.
Why authors often buy a block
Nielsen explains that different formats and revised editions can require separate ISBNs, so authors planning more than one edition may find a block more practical.
Do not reuse an ISBN across formats
A paperback and hardcover are distinct product formats and should not share the same ISBN.
KDP alternative
KDP offers a free ISBN for eligible paperback and hardcover books, but its free ISBN is limited to KDP.
Official sources
Platform fees and rules can change. Use the source links below when making a final publishing decision.
This page provides general publishing information, not legal, tax or financial advice. Service scope and third-party platform terms should be confirmed before purchase or publication.
