He synthesizes historical occult practices into a definitive, logical framework of cause and effect (e.g., the Law of Association, Law of Similarity).
He defines this as magic pertaining to the intellect, mental powers, and the study of the mind (as opposed to strictly "black" or "white" moral classifications).
The book is celebrated for being the only academic treatise on magic to earn the author a Bachelor of Arts in Magic from the University of California, Berkeley. Rather than a "useful paper," it is a full-length book widely available in print and digital archives. 📖 Accessing the Text
The book features his highly famous "Cult Danger Evaluation Frame," a tool used widely to measure the psychological hazards of organizations.