Reviews of the excellent 'Strange Angel: The Otherworldy Life of Rocket Scientist John Whiteside Parsons' by George Pendle:

http://www.avclub.com/review/george-pendle-istrange-angel-the-otherworldy-life-4699

http://www.theguardian.com/books/2005/aug/21/biography.features1

'Apocalypse Culture' edited by Adam Parfey includes the essay 'Sorcerer of Apocalypse: An Introduction to John Whiteside Parsons' by Michael Staley (from 'Starfire' #3)

http://www.trussel.com/lyman/apocaly.htm