Tertium Organum: The Third Canon of Thought

P. D. Ouspensky

Heaven and Hell: A 2011 Abridged Edition

Emanuel Swedenborg edited by Simon Parke

This House is Haunted

Guy Lyon Playfair

Passport to the Cosmos

John E. Mack

Tertium Organum

P. D. Ouspensky

Cosmic Consciousness

Richard Maurice Bucke