Over fifty years ago Israel Regardie set himsefl the gigantic task of making acessible 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, Regardie skillfully unifies a waelth 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.