: Ken Wilber's Integral Vision in the New Millennium", 2006, ISBN 1-55778-846-4* Donald Jay Rothberg and Sean Kelly, "Ken Wilber in Dialogue: Conversations With Leading Transpersonal Thinkers", 1998, ISBN 0-8356-0766-6* Frank Visser, "Ken Wilber: Thought As Passion", SUNY Press, 2003, ISBN 0-7914-5816-4, (first published in Dutch as "Ken Wilber: Denken als passie", Rotterdam, Netherlands, 2001)* Joseph Vrinte, "Perennial Quest for a Psychology with a Soul: An inquiry into the relevance of Sri Aurobindo's metaphysical yoga psychology in the context of Ken Wilber's integral psychology", Motilal Banarsidass, 2002, ISBN 81-208-1932-2==External links==* Ken Wilber's official website* Ken Wilber's official Facebook page* Interview with Ken Wilber, Salon.com* Ken Wilber books - Shambhala Publications* IntegralWorld - An independent forum for a critical discussion of the integral philosophy of Ken Wilber, created by Frank Visser.
* Donald Jay Rothberg and Sean Kelly, "Ken Wilber in Dialogue: Conversations With Leading Transpersonal Thinkers", 1998, ISBN 0-8356-0766-6* Joseph Vrinte, "Perennial Quest for a Psychology with a Soul: An inquiry into the relevance of Sri Aurobindo’s metaphysical yoga psychology in the context of Ken Wilber’s integral psychology", Motilal Banarsidass, 2002, ISBN 81-208-1932-2* Brad Reynolds, "Embracing Reality: The Integral Vision of Ken Wilber: A Historical Survey and Chapter-By-Chapter Review of Wilber’s Major Works", 2004, ISBN 1-58542-317-3* Lew Howard, "Introducing Ken Wilber", May 2005, ISBN 1-4208-2986-6* Raphael Meriden, "Entfaltung des Bewusstseins: Ken Wilbers Vision der Evolution", 2002, ISBN 88-87198-05-5* Brad Reynolds, "Where’s Wilber At?