The Minneapolis-St. Paul Star Tribune has a short profile of Lawrence Sutin, author of the excellent Philip K. Dick biography Divine Invasions. His other works includes Do What Thou Wilt: A Life of Aleister Crowley.
His latest book, All is Change, 'tracks Buddhism's influence on Western thought from ancient Greece to modern America.'
I heartily recommend Divine Invasions. It is essential to a balanced understanding of PKD.