Stranger In A Strange Land by Robert A. Heinlein (Great book)
Supernatural by Graham Hancock (Awesome book on human history and psychedelic usage)
Warlock by Wilbur Smith (Egyptian themed drama that "tracks a power struggle in ancient Egypt between false pharaohs and a true royal heir." Then again I'm also a bit obsessed with Ancient Egypt.)
Breaking Open the Head: A Psychedelic Journey into the Heart of Contemporary Shamanism by Daniel Pinchbeck
2012: The Return of Quetzalcoatl by Daniel Pinchbeck (an examination of prophecy through personal and philosophical approaches as well as global consciousness transformation theories, etc. Just an interesting read to me.)
Mutant Message Down Under by Marlo Morgan ("Chronicles the journey of a middle-aged, white, American woman with a group of 62 desert Aborigines, the "Real People", across the continent of Australia. The author states the book was written after the fact inspired by actual experience."
Illusions: The Adventures of a Reluctant Messiah by Robert Bach (Really awesome book. "Mystical adventure story revolving around two barnstorming pilots who meet in a field in midwest America. The two main characters, who are doing what each one really wants to do, take on a relationship of teacher-student about the illusions that make reality.")
Now I know some of the books I listed make radical claims and some people really really believe in them, but I read them and they allowed me to think in ways I may not have before... if the information they present is true or false, I simply do not care, I was entertained and that is enough to satisfy me.