n nDo what thou wilt shall be the whole of the Law. n nThis oft misunderstood phrase, which forms the basis for Crowleys practice of Magick, is found in The Book of the Law. The Book of the Law is the source book and key for Crowley students and for the occult in general. n nThe holy text that forms the basis of Crowleys belief system, Thelema, was transmitted to him by the entity known as Aiwass over the course of three fateful April days in Cairo in 1904. With his wife Rose as the medium for what would become known as the Cairo Working, Crowley dutifully transcribed the communications on hotel stationery. n nThis Weiser Books edition contains the corrected text of the 1938 edition with a facsimile of Crowleys handwritten manuscript.n