Recommended reading

From The Maze Where Realities Converge - the psychedelic encyclopedia of reality from The Ultimate Comment

Friedrich Nietzsche: Thus Spoke Zarathustra, Beyond Good and Evil (Walter Kaufmann's translations)
Jean-Paul Sartre: Nausea, Being and Nothingness, The Transcendence of the Ego
Martin Heidegger: Being and Time
Peter Carroll: Liber Null
Aleister Crowley: Book 4, The Book of Lies
Robert Anton Wilson: Prometheus Rising, Quantum Psychology
Oscar Wilde: The Picture of Dorian Gray and any of the 'society' plays
Joseph Campbell: Hero With A Thousand Faces
Malaclypse The Younger: Principia Discordia
Lewis Carroll: Alice's Adventures in Wonderland
Jack Kerouac: On The Road, The Dharma Bums
Karl Popper: The Logic of Scientific Discovery
The Enneads of Plotinus
The Doors of Perception by Aldous Huxley
Hagakure: The Book of The Samurai by Yamamoto Tsunetomo