The Illuminatus! Trilogy
by Robert Anton Wilson
, Robert Shea
Jesus teaches the Disciples Bingo as part of the "secret teachings" (Luke! Don't write that down!), the Greek gods take drugs and have visions of Laurel & Hardy, a Cthulu monster resides in the Pentagon, the Republicans and the Black Panthers and the AAA are on the same spoke in the conspiracy wheel.
With a very confused and barely recognizeable plot about a disappearing radical reporter and a submarine filled with anarchists (or are they?) Robert Anton Wilson and Robert Shea create one of the most hilarious books about religion, spirituality, society and politics. Most of the book echoes Robert Anton Wilson's obsessions with Eastern religoins, sex, James Joyce and Kabala but there is enough of Robert Shea's personality in the thing to keep it on an even keel.
At 800 pages, you'll read the trilogy in a week and beg for more once you are done. Whether you are Christian, Buddhist, agnostic, Jewish, pagan, Discordian or Muslim, this book will shock, amaze and make you see the world in a whole new way.