On May 16, 2015 ev, Ordo Templi Orientis celebrated its North American Centennial—commemorating the founding of Canada's British Columbia Lodge No. 1 in 1915—with a day-long conference hosted in Vancouver by O.T.O. Canada. Prominent researchers and leaders of O.T.O. were invited to deliver papers on this occasion, which are presented here along with additional essays to enhance the utility of this collection for Order members, and other students and practitioners of Thelemic spiritual development. This commemorative festschrift volume is dedicated to Frater Superior Hymenaeus Beta —for 2015 also marks the 30th anniversary of his governing Ordo Templi Orientis. All of the conference presenters, supplemental essayists, Frater Superior's Representatives, and National Grand Masters are honored to be able to express our gratitude and appreciation for his leadership over these decades.