Some of the following books have changed my life, for the better or worse, at certain critical periods; others I feel have the potential to change my life if I ever feel inclined to take their advice. In no particular order:
Quantum Psychology and Cosmic Trigger, by Robert Anton Wilson.
Beyond the Occult and Mysteries, by Colin Wilson
Meeting the Shadow: The Hidden Power of the Dark Side of Human Nature, Edited by Connie Zweig and Jeremiah Abrams
Missing Time and Intruders, by Budd Hopkins
The Threat, by David Jacobs
The Eden Express, by Mark Vonnegut.
Catcher in the Rye, by JD Salinger.
To Kill a Mockingbird, by Harper Lee.
An Experiment With Time, by JW Dunne.
A Little Book on the Human Shadow, by Robert Bly
Beyond Good and Evil, by Neitzche
The Soursebook of Magic: A Comprehensive Guide to the Technology of NLP, by L. Michael Hall, PhD & Barbara P. Belnap, MSW
The writings of Bricoleur (now off-line, unfortunately, but I believe it's because he is putting together a book based off these writings).
Various writings by Carl Jung.
The Hero With a Thousand Faces, by Joseph Campbell.
The Missing Piece Meets the Big O, by Shel Silverstein.
Alchemy: The Art of Transformation, by Jay Ramsay, particularly chapter 4.
Jung and the Alchemical Imagination, by Jeffrey Raff.
The Principia Discordia, by Macalypse the Younger.
Who Moved my Cheese? by Spencer Johnson, MD
Man's Search for Meaning, by Viktor E. Frankl
DMT: The Spirit Molecule, by Rick Strassman.
Zen & the Art of Motorcycle Maintenance, by Robert M. Prisig.