- Foundations of Tibetan Mysticism
- The Way of the White Clouds
- Inner Structure of the I Ching
- The psychological attitude of early Buddhist philosophy and its systematic representation according to the Abhidhamma tradition
- Foundations of Tibetan Mysticism - According to the Esoteric Teachings of the Great Mantra Om Mani Padme Hum. Photographic Plates by Li Gotami. Rider. 1973.