In this book, Israel Regardie lifts the cloak of mystery which has shrouded the Hermetic Order of the Golden Dawn, the Rosicrucian Fraternity and the Masonic Lodge. From his close personal associations, Regardie reveals the true nature and actions of such leading Occult authorities as Aleister Crowley, Dion Fortune, S. L. MacGregor Mathers, Dr. W. W. Wescott, and others.