What do altered states tell us about the nature of consciousness? And what can philosophy tell us about altered states? John Buchanan has spent his life trying to find the answers. His book, Processing Reality: Finding Meaning in Death, Psychedelics, and Sobriety, details the story of his history of experimentation and addiction, his path to sobriety, and the insights he has gained into the nature of human experience and consciousness.

A synthesis of Whitehead's process philosophy and Grof's transpersonal psychology, Buchanan's ideas provide a framework for understanding not only the nature of the psychedelic experience and other altered states, but also the nature of consciousness itself and the structure of the cosmos.