Volume One of The Collected Works of Ken Wilber includes- . 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. . 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. . Several important early articles- "The Psychologia Perennis," "Are the Chakras Real?" and "Where It Was, I Shall Become."