Volume One of The Collected Works of Ken Wilber includes- amp;#160; * The Spectrum of Consciousness (1977)-one of the founding texts of transpersonal psychology-introduces the full-spectrum model, showing how the psychological systems of the West can be integrated with the contemplative traditions of the East. amp;#160; * No Boundary- Eastern and Western Approaches to Personal Growth (1979) is a simple yet comprehensive guide to psychologies and therapies available from both Western and Eastern sources. amp;#160; * Several important early articles- The Psychologia Perennis, Are the Chakras Real? and Where It Was, I Shall Become.