While I’m not generally interested in the occult, I came across a truly fascinating book a few months ago: Psychic Self-Defense: The Classic Instruction Manual for Protecting Yourself Against Paranormal Attack by Dion Fortune. (The title sounds sort of campy, but the book is not that way at all).
A 20th century British psychologist, occultist, Christian kabbalist, and author, Fortune (1890-1946) is considered one of the most significant and respected authorities in this field. She is actually quite erudite, articulate, and seems to possess an impressively proper disposition and temperament for someone doing genuine work in this area. You get the sense that she’s really coming from a place of integrity within (as much as can be expected from an occultist, I suppose).
My spiritual orientation is all about the inward focus; the inner journey to healing and self-realization. Occult work, on the other hand, whether white (good intentioned) or black (bad intentioned), is very outward focused. It seems to involve all sorts of manipulation of the unseen world and energies, in order to affect three dimensional reality (for good or bad).