Hardcover matcher does not appear to work with ISBN 13 identifiers

[mark-monteiro]

I have many entries in my failed book report that do in fact have valid ISBN 13 identifiers. It looks like the lookup logic is not making a correct distinction between ISBN 10 and ISBN 13 identifiers, but that's just my assumption. For the first few entries I have manually validated that the ISBN entry does match what is in Hardcover. Of the 86 failures in my report, 84 have ISBN 13 identifiers (the remaining two have ASIN identifiers, but that may be a separate issue).

Here is an excerpt from my failed book report:

================================================================================
SHELFBRIDGE - FAILED BOOKS REPORT
================================================================================

Generated: 2026-03-11 02:33:47 UTC
Total Failed Books: 86

SUMMARY BY CATEGORY
--------------------------------------------------------------------------------
  Not Found in Hardcover:           86
  Match Rejected (Low Confidence):  0
  Already in Your Library:          0

================================================================================
NOT FOUND IN HARDCOVER (86)
================================================================================

These books could not be found in Hardcover's database using ISBN, ASIN, or title/author search.

[1] Project Hail Mary
    Author: Andy Weir
    Identifiers: ISBN: 9780593135211
    Reason: Book not found in Hardcover database after searching by identifiers and title/author
    Suggested Actions:
      • Manually add this book to your Hardcover library first
      • Check if the ISBN/ASIN in Audiobookshelf metadata is correct
      • Try updating the book metadata in Audiobookshelf with corrected identifiers
      • Search for the book manually in Hardcover to see if it exists under a different title or edition
    Additional Details:
      {
        "searchedIdentifiers": "ISBN: 9780593135211",
        "titleSearched": "Project Hail Mary",
        "authorSearched": "Andy Weir",
        "dryRun": true
      }

...

Let me know if any additional details are required to investigate