Stranger In A Strange Land (and its follow up The Cat Who Walks Through Walls), Robert Heinlien

Sidhartha, Herman Hess

The Confessions, St. Augustine

The Hitchhiker's Guide Series, Douglas Adams

Brave New World, Huxley

Henry IV, Shakespeare

The Little Prince, That French Guy (Exubiere?)

Hammer of the Gods (The Led Zeppelin Story), ???

Plato's Cave & Plato's Republic and everything else by Plato, Everything by Georges Bataille (Visions of Excess), Aristotle, Leibnitz, Spinoza, Michele Foucault (Madness & Civilization and Discipline and Punishment).

I am sure I am missing some important ones.