In this cogent and intensely readable account of the life of the controversial occult hero and synthesiser of the Magick philosophy, Francis King examines each of the three main sources of Magick, throwing new light onto Crowley himself, and doing much to explain the continuing admiration for his writings which has been displayed by individuals as diverse as occultists, film directors from Kenneth Anger to Donald Cammell, and rock musicians such as Led Zeppelin's Jimmy Page.