Cleansing the Doors of Perception: The Religious Significance of Entheogenic Plants and Chemicals Paperback – 1 April 2003

Cleansing the Doors of Perception: The Religious Significance of Entheogenic Plants and Chemical

The Doors of Perception and Heaven and Hell (P.S.)

Food of the Gods: The Search for the Original Tree of Knowledge A Radical History of Plants, Drugs, and Human Evolution