Forty years ago the University of California Press published an unusual manuscript by an anthropology student named Carlos Castaneda. The Teachings of Don Juan initiated a generation of seekers dissatisfied with the limitations of the Western worldview. Castaneda's now classic book remains controversial for the alternative way of seeing that it presents and the revolution in cognition it demands. Whether read as ethnographic fact or creative fiction, it is the story of a remarkable journey that has left an indelible impression on the life of more than a million readers around the world.