Altered states of consciousness

"Combining the best of the humanistic and scientific traditions, this book covers the effects of drugs, yoga, self-hypnosis, mutual hypnosis, meditation, brainwave feedback, and dream consciousness. As the author states in his introduction: "The 1980s have been thought of as a conservative time. With respect to consciousness exploration by individuals in point of fact such exploration is still very much with us. It will stay with us, for better or worse, because of dissatisfaction with the limitations of our culture."" --provided by Goodreads.