Psychedelic art & society; Art & psychedelic experience; Context, value & direction, by Barry N. Schwartz; The psychedelic artist, by Stanley Krippner. 30 color and 110 b/w illustrations. Bibliography.
One of the best books on psychedelic art before psychedelic art became a style. The excellent text includes one of the best descriptions of the "layers" of the psychedelic experience I have read. Highly recommended for historians, "experienced" readers, and psychonaut wannabes.