A collection of Aleister Crowley's writings on occult medicine, particularly on Amrita: an ambrosia or "elixir of life" said to ensure longevity, restore youth and energy, and bestow various occult boons. It was referred to by Crowley as "the principal Secret of the Ordo Templi Orientis (O.T.O. )." Edited with an introduction by Martin P. Starr. Contents are: Foreword by Soror Grimaud (Helen Parsons Smith); Introduction by Martin P. Starr; A. M. R. I. T. A. ; The Elixir of Life: Our Magical Medicine; The Elixir of Life (I); The Elixir of Life (II); The Order of the Purifications on Waking; Remarkable Experiment with the Elixirof Life; AMRITA; Additional Cases; IT; On Food.