Aleister Crowley (1875-1947) was one of this century's most profound students of Magick, Qabalah and Yoga psychology. He is now widely recognized as the first Western investigator to give initiation a truly scientific method.
Lon Milo DuQuette is an Adeptus Exemptus of The Hermetic Order of the Golden Dawn and a high-ranking officer of Thelemic Esoteric Orders. He is regarded as one of the leading authorities on Enochian Magic. He is the co-author of "Aleister Crowley's Illustrated Goetia" and "Sex Magic, Tantra & Tarot" among other works.
Christopher S. Hyatt, Ph.D. is a leading authority on Sex Magick and Tantra. He is the author of the world famous "Undoing Yourself With Energized Meditation; Secrets of Western Tantra; The Tree of Lies" and many other works. For years he was Israel Regardie's close associate and is the President of the Israel Regardie Foundation.