Mysticism and Magic are two interconnected paths with a common ultimate goal of union with the Divine. Aleister Crowley was taught the system of Yoga in Ceylon, in the Himalayas, and in Europe, and the first part of the book is dedicated to recording the personal experience and knowledge he gained from his long apprenticeship on the mystical path of the East.

In reality, Book 4 serves as an introduction to the deeper workings of Western esotericism, recorded with clarity and in the author's familiar sarcastic style.

[Excerpt from the text on the back cover of the edition]