U.S.G.L. offers an extensive online library containing documents of interest to O.T.O. members, Thelemites, and scholars of the Western esoteric tradition.
U.S.G.L. also holds a physical library containing books and papers of historical or technical interest. Policies and procedures for access to this collection are currently under development. A somewhat outdated library catalog is available as an Excel spreadsheet. Watch this page for updates in the near future.