My inspirations are:
The Manson Murders
James Ellroy’s Blood’s A Rover
Anton LeVay’s Magic Circle
The collective amphetamine psychosis of US government officials in that era
The Hounds of Tindalos
The CIA drug magician (probably a result of amphetamine psychosis)
William S. Burroughs
Hunter S. Thompson
Kenneth Anger
With some other mythos mixed in
Thoughts From The Peacock Angel 