What are your three favorite books?
Specifically outside of the Satanic canon.
Mine are American Gods by Neil Gaiman, Horns by Joe Hill, and Swan Song by Robert McCammon, with honorable mentions to The Shining by King and Mister B. Gone from Barker.
If I were to give a couple non-fiction answers, they would be The Ego and it's Own and Might is Right, although the former is a bit of a tough read and the latter can get a little... ethno-centric for my tastes.