Here’s an extensive collection of Process related material, including photographs, Exit and other texts by by Robert DeGrimston, letters and recollections by former members, and various articles including a wacky article by a LaRouche follower called We Must Exit the Suicide Club: How the Counterculture Ushered in Fascism.
Update: The parent site has some… questionable content. I do not endorse it.
Update 2: For even more on The Process Church, check out our dossier.
Update 3: The Church’s magazines have been collected in a book from Feral House called Propaganda and the Holy Writ of The Process Church of the Final Judgment