Ken Wilber is one of the most influential and widely read American philosophers of our time. His writing has been translated into more than 20 languages. Ken Wilber is the author of many books, including The Spectrum of Consciousness; The Eye of Spirit; Grace and Grit; Sex, Ecology, Spirituality; A Brief History of Everything; Boomeritis;<.EM> and The Marriage of Sense and Soul. Ken Wilber lives in Denver, Colorado.