The 1907 Carnegie-built Foley Library houses a variety of historical collections and formats. Library monograph and periodical holdings are published and catalogued works on local and regional history, the Gold Rush, and more. Researchers will find a rich resource for examination of the history and status of mining, immigration, ethnic groups, and economic and social development in this California crossroads county and region. See "Additional Collection Guides" for more detail.

Several thousand volumes

The library can only claim physical ownership of the collection. Users are responsible for satisfying any claimants of literary property.

Collections are self-service, open to the public.