The History of Sexuality - Michel Foucault
  Discipline and Punish - Michel Foucault
  The Image: A Guide to Pseudo-Events in America - Daniel J. Boorstin

These books make you look at society in a much more critical manner. The first two are difficult reads, but none the less good and referenced quite a bit in the humanities.

  The Perennial Philosophy - Aldous Huxley

Huxley ties up all the different religious views quite nicely into a core set which is common to all of them. I'd advise reading Huxley and God before reading this though.