We’ve recently imported 5,148,400 new records from the Library of Congress into OverCat, LibraryThing’s data repository. This brings the total number of records in OverCat to nearly 78 million! That’s 78 million high-quality library (MARC) records you can use in cataloging on LibraryThing.

This new dataset was produced by the Library of Congress from records in the 2014 Retrospective file sets—the most recent currently available. The Library of Congress provides these MARC records as part of its MARC Open Access program. Although LibraryThing adds MARC records to Overcat as members search for them, this is our first mass update from Library of Congress data since OverCat debuted in 2010.

Thanks to developer CCatalfo‘s efforts to make this happen. Notice anything different in OverCat? Join the discussion and tell us about it on Talk.

Further reading

• OverCat’s introduction: https://blog.librarything.com/2010/06/announcing-overcat/