<p>So concludes what Levi considered to be his testament, his most important and final treatise, and a summation of his esoteric philosophy. This volume is the conclusion of the work he started as Book One,<i>The Heiratic Mystery or the Traditional Documents of High Initiation</i>, published as<i>The Book of Splendours</i> (Weiser, 1984). <i>The Great Secret</i> contains his final two works. In Book Two,<i>The Royal Mystery or Art of Subduing the Powers</i>, Levi discusses such topics as Evil, the Outer Darkness, the Great Secret, Magical Sacrifice, Evocations, the Arcana of Solomon's Ring, and the Terrible Secret. In Book Three,<i>The Sacerdotal Mystery or the Art of being Served by Spirits</i>, he expounds on the subjects of Aberrant Forces, the Chaining of the Devil, Sacred and Accursed Rites, Divination, Dark Intelligence, and the Great Arcanum.</p>