Kingsley is the author of, In The Dark Places Of Wisdom,
Reality, and other books that trace back and re-evaluate our true Western roots in mysticism, philosophy, etc.
He lectures widely and is sort of the equivalent of an Alex Haley (author of Roots) for digging up
our long buried Western roots in mysticism and philosophy and challenges long held interpretations of ancient texts and their significance in the unfolding of Western thought and spirituality.
Here's his homepage -
http://www.peterkingsley.org/pages.cfm?ID=2 Peter Kingsley Interview
Part 1
http://www.youtube.com/watch?v=5NhfLP-FwpY Pt.2
http://www.youtube.com/watch?v=6Dq3OSLN_dc&feature=relatedOR
Complete Interview
http://video.aol.com/video-detail/peter-kingsley-complete-interview/3810531276Article: The Spiritual Tradition At The Roots Of Western Civilization
http://peterkingsley.org/pkoffice/images/SpiritualTradition.pdf