Written by Theosophist CW Leadbeater. This book is one of his major works.

25 Chapters, split into 5 sections; Introductory; How we are Influenced; How we Influence Ourselves; How we Influence Others; and, Conclusion. ‘The term ‘occultism’ is one which has been much misunderstood. In the mind of the ignorant it was, even recently, synonymous with magic, and its students were supposed to be practitioners of the black art, veiled in flowing robes of scarlet covered with cabalistic signs, sitting amidst uncanny surroundings with a black cat as a familiar, compounding unholy decoctions by the aid of satanic evocations.’