The ISBNdb alternative

ISBNdb has run a paid book-metadata API for over two decades, and for flat ISBN lookups it works. But every record is an island: 19 metadata fields per ISBN, no connection between the hardcover, the paperback, the audiobook, and the translation that are all the same book.

Bookmode's catalog is built around works: every edition is clustered under its canonical work, so one call answers “give me every ISBN of this book” — the question flat ISBN databases can't answer at all.

Where Bookmode goes further

• Works clustering — edition ↔ work relationships across formats, printings, and translations
• Ratings signal — licensed aggregate ratings by API; ISBNdb carries none
• Freshness — ONIX publisher feeds surface titles months before publication instead of after crawlers find them
• Identifier graph — ISBN-10/13, LCCN, OCLC, and cross-catalog identifiers linked per edition

Pricing is designed to be self-serve with no enterprise minimums — so switching is a data-quality upgrade, not a budget conversation.