 I and Thou by Martin Buber |  The Book by Alan Watts |  The Perennial Philosophy by Aldous Huxley |  Sex, Ecology, Spirituality by Ken Wilber |  Critique of Religion and Philosophy by Walter Arnold Kaufmann |  On Evil by Terry Eagleton |  Sources of the Self by Charles Taylor |  The Spectrum of Consciousness by Ken Wilber |  The Way of Zen by Alan Watts |  The Book of Not Knowing by Peter Ralston |  Works of Love by Soren Kierkegaard |  In Search of the Miraculous by P. D. Ouspensky |  Zen in the Art of Archery by Eugen Herrigel |  The Undiscovered Self by C. G. Jung |  The Unfettered Mind by Takuan Soho |  The Birth and Death of Meaning by Ernest Becker |  True Hallucinations by Terence McKenna |  The Courage to Be by Paul Tillich |  The Act of Creation by Arthur Koestler |  Irrational Man by William Barrett |