This work investigates the nature of the occult experience by examining the intersection of altered states of consciousness, ritual practice, and the human psyche. Nevill Drury, a noted writer on Western esotericism, draws upon historical accounts, psychological frameworks, and contemporary occult practices to analyze how individuals perceive and interpret non-ordinary realities. The book posits that these experiences are not merely subjective delusions but represent a significant, albeit often misunderstood, dimension of human cognition and spiritual exploration.

The text provides a balanced, scholarly overview of esoteric practices, making it a useful resource for those seeking to understand the mechanics of occult phenomena from a psychological and historical perspective. Its analytical approach avoids sensationalism, focusing instead on the structural and experiential components of the subject matter.