Or the Koran, etc. etc.
My choices would be,
1. Alice's Adventures in Wonderland/Through the looking glass and what alice found there. By Lewis Carroll
2. The Complete Hitch-hikers guide to the galaxy, by Douglas Adams.
3. Cats Cradle, By Vonnegut Jr. (Or almost anything by him, also particularly Sirens of the Titans)
What about you? What book or narative do you think presents a better understanding of Morality/reality/sexuality/ and/or spirituality, then the trash presented by the pig religions?