- Sacred Earth: The Spiritual Landscape of Native America
- Native American Traditions (The Element Library)
- The Secret History of Western Sexual Mysticism: Sacred Practices and Spiritual Marriage
- Theosophia: Hidden Dimensions of Christianity
- Magic and Mysticism: An Introduction to Western Esoteric Traditions
- Brian Leigh Molyneaux
- S. Buol
- Sharon A. Cohen
- Janet Lyons
- Jean Gallagher
- F. Hole
- Harry Lund
- Viola Kneeland Beaudoin
- Michael Heim
- Public Domain Research
- H. Wayne Pritchard
- Phra
- Walter J. Scott
- Amy Wynn Pastor
- Jane Ockershausen
- Carol Anne Campbell
- Ralph McCracken
- Will McVicar
- Karl A. Drlica
- Donatella Trotta