In this telling metaphysical work, Carlos Castaneda recounts a series of supernatural/other worldly experiences alternating between the tantalising and the terrifying. Under the tutelage of his Yaqui tutor don juan, and aided and abetted by a combination of hallucinogenic plants lsuch as the Peyote, Jimson weed and the 'humito' mushroom, Castaneda plunges into an unknown world, where shamans transform into wolves and sorcery enables taking the form of a crow. The experiments however are laced with mortal danger as Castaneda himself would be wont to experience. This is a triumph of controversy, a challenge to credibility and a veritable gauntlet for rational Science to pick up!