A note on Sade's character: Although he advocated murder as a form of
self-expression, he adamantly opposed capital punishment ("Only
passion justifies murder, and the state has no passions."). For a
short while during the French Revolution, Sade was a judge, and
refused to sentence several aristocrats to death. He wound up in the
Bastille for it, and nearly was guillotined.
There is also, of course, Principia Discordia and the Book of the
SubGenius. Also, there's the works of H. P. Lovecraft and Alester
Crowley, and the rather poor "Necronomicon" that somebody-or-other put
together. Also consider tracking down works on Tantric Yoga, since
Tantra involves using sexual energy to get enlightment, it should
freak out the normals.
Dale