Let's see, in order:
The Green Machine (Learned to read to this book)
Mrs. Piggle Wiggle (Major props to anyone who knows what I'm talking about)
The World of Pooh
1984 (4th grade - maybe not the best idea)
Dave Barry (various)
Animal Farm
Brave New World
The Far Side, Calvin and Hobbes, Bloom County, Doonesbury anthologies
Night (?) by Elie Wiesel
Zen and the Art of Motorcycle Maintenance
Lila (in retrospect... meh)
Siddhartha
everything by Alan Watts
Buddhism plain and simple by Steve Hagen
Doors of Perception, everything else linked to off of erowid
The Vaults of Erowid - every single fucking report. Yes really.
Cartoon History of the Universe - very good to know this stuff
Zig Zag Zen - a guide to buddhism and psychedelics
Everyday Zen and Nothing Special by Charlotte Joko Beck - these are the books you should read after you read all the other zen books and drug books and get tired of koans and monks and big trips and are really ready to start working
Middlesex by Jeffrey Eugenides
Lolita by Nabokov
currently working on: Unbearable Lightness of Being
Not all of these are good books or worthwhile, but they seem to be the biggest players I can remember.