- Western Esotericism: A Concise History (SUNY Series in Western Esoteric Traditions)
- Eternal Hermes: From Greek God to Alchemical Magus
- Access to Western Esotericism (Suny Series in Western Esoteric Traditions)
- Modern Esoteric Spirituality (World Spirituality: An Encyclopedic History of the Religious Quest, Volume 21)
- Theosophy, Imagination, Tradition: Studies in Western Esotericism (Suny Series in Western Esoteric Traditions)