Plant Spirit Shamanism - Ross Heaven 

Food of the Gods - Terence McKenna

Cactus of Mystery - Ross Heaven 

Until You Die - Osho

In Search of the Miraculous - PD Ouspensky (Gurdjieff's teachings)

The End Of Your World - Adyashanti 

Healing With Wholefoods - Paul Pritchard 

Practical Psychic Self Defense - Robert Bruce 

Cellular Awakening - Barbara Wren 

Sacred Mushroom and the Cross

Mushrooms, Myths and Mithras - The Drug Cult that Civilized Europe