#paperback#transcendental#consciousness#spirituality Some minor wear to cover. -- In this, his culminating work, the leading international figure in consciousness research masterfully synthesizes his vast findings, drawing not only upon psychedelic therapy and Holotropic Breathwork, but also from literature, cross-cultural studies, ancient mystical sources and psychological data, resulting in a profound consolidation and articulation of what is now known about nonordinary states of consciousness.