Piotr Demanovich Ouspensky (1878-1947) wrote:
- Tertium Organum, a Key to the Enigmas of the World
- The Strange life of Ivan Osokin
- The Psychology of Man's Possible evolution
- The Cosmology of Man's Possible evolution
- A New Model of the Universe: Principles of the Psychological method in its Application to Problems of science, Religion and Art
- Talks with a Devil
- The Fourth Way
- The Symbolism of the Tarot
- Letters from Russia 1919
- Conscience, the Search for truth
- A Record of Talks and Answers to Questions based on the Teaching of G.I. Gurdjieff
- A Further Record
- A Record of Meetings
- In Search of the Miraculous: Fragments of an Unknown Teaching