Philosophy: About Gitenstein Library and Nearby Research Libraries

"As of March 1, 2023, Princeton University Library is no longer charging to access Firestone Library. Instead, visiting scholars, independent researchers, and community members are now able to make a reservation, of which there are 25 daily on a first-come, first-served basis. For this reason, we will no longer be giving or selling access passes to non-profit organizations, colleges and universities, and public libraries."

WorldCat is a "union catalog" of records that describe tens of millions of books held by U.S. libraries.