U.S.G.L. maintains a physical library, dedicated the “William E. Heidrick Memorial Library”, which contains books, papers, and other materials of historical or technical interest. The late William E. Heidrick was a longtime, beloved memory of Ordo Templi Orientis who was Grand Treasurer General for many years, having taken initiation during the administration of Hymenaeus Alpha. For more details about its physical and digital holdings visit:
https://lib.oto-usa.org/index.html
