Psychic Self-Defense; A Study in Occult Pathology and Criminality, by Dion Fortune.

Occultist explains how to detect psychic attacks and provides detailed instructions for defense against them. Includes amazing revelations about Black Lodges, methods, motives and physical aspects of psychic attacks, vampirism, vampire marks, pathology of non-human contacts, projection of the etheric body, substances employed in black magic, and more.