The most comprehensive introduction available to the Golden Dawn system of initiation, and the numerous, complex and sometimes obscure mystical writings of Aleister Crowley. Over fifty years ago Dr. Israel Regardie set himself unto the gigantic task of making accessible to the intelligent layman the root principles upon which Magic is built-principles which Aleister Crowley devoted his life to exploring and revealing. Drawing on his experience as personal secretary to Crowley and his involvement with the Golden Dawn system of Magic, Regardie skillfully unifies a wealth of diverse material into a marvelously coherent whole. The result is The Tree Of Life, a book which has become the definitive overview of the Western Mystery Tradition.