- The Mystery of Manna: The Psychedelic Sacrament of the Bible
- Unconscious Wisdom: A Superego Function in Dreams, Conscience, and Inspiration
- Gnosis: An Esoteric Tradition of Mystical Visions and Unions (S U N Y Series in Western Esoteric Traditions)
- The Ecstatic Imagination: Psychedelic Experiences and the Psychoanalysis of Self-Actualization
- Crucified With Christ: Meditation on the Passion, Mystical Death, and the Medieval Invention of Psychotherapy