| http://www.w3.org/ns/prov#value | - He is the author of many books, including the classics, Altered States of Consciousness (Harper 1990) , Transpersonal Psychologies: Perspectives on the Mind from Seven Great Spiritual Traditions (HarperCollins 1992), and The End of Materialism: How Evidence of the Paranormal is Bringing Science and Spirit Together (New Harbinger 2009).
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