Robert Anton Wilson - Prometheus Rising: awesome manual on how to deprogram & reprogram.
Robert Anton Wilson - Cosmic Trigger: fascinating biography
Robert Anton Wilson & Robert Shea - Illuminatus! Trilogy: Funny and intriguing conspiracy story featuring Hagbard Celine and his golden submarine (the Leif Ericson) vs the Illuminati.
Philip K. Dick - Valis & The Divine Invasion: PKD wrote "revelation" disguised as sci-fi, he didn't really understand what was going on in his head, a quote by him: "After all if you're a buddha, you should be able to figure it out for yourself."
Terence McKenna - True Hallucinations: my favorite orator goes into the Amazon with his brother to trip on psychedelics and things get weird. (The audiobook has great production, music and sound effects that really add to the experience.)
Lewis Carrol's Alice in Wonderland and Through the Looking glass for the wonderful lifehacks. (Lesser imaginative conspiracy theorists, this obviously means I am a mind controlled puppet of the illuminati.)
Rick Strassman - DMT The Spirit Molecule: fascinating musings and reports of his experiments on test subjects with the psychedelic DMT, specifically the weird alien encounters.
Herman Hesse's Steppenwolf: visit the Magic Theatre!
Lon Milo DuQuette - Low Magick It's All in Your Head You Just Have No Idea How Big Your Head Is: my favorite occult author, great humor and explanations.
John Lilly - Simulations of God: Great exposition of different reality tunnels and human motivations.
Anything from Terry Pratchett's Discworld series: Hilarious fantasy humor, only read a handful so far but enjoyed each one, reading "Guards! Guards!" now. Small Gods is my favorite so far, I'm still wondering if Terry Pratchett is in fact a master magician in real life or just really clever at life.