Aleister Crowley devoted twenty-five years to writing and producing the four parts of this book. It is his magnum opus, in which he systematically expounds the mystical and magical theories and techniques taught in his magical orders. This edition incorporates Crowley`s own additions, corrections and annotations, and restores dozens of passages omitted from the first editions. Extensively cross-referenced and annotated, this edition features over 100 diagrams and photographs, as well as a glossary, bibliography, and detailed index. Hardcover, 842 pages.