Ender's Game! After reading about all of the success Peter had, I want to take over the world too!
(Also any book by Orson Scott Card. He's The Man)
The Book of Mormon: Because Mormons are cool.
His Dark Materials series (Includes The Golden Compass, The Subtle Knife, and The Amber Spyglass)
Anything by I. Asimov Grandmaster of Science Fiction
Edgar Allan Poe: The Gold Bug, The Raven, and The Fall of the House of Usher
Harry Potter: Because secretly I wish I could be a wizard, too.
The Screwtape Letters: If you want to learn more about how not to be a bad person, read this. I learned more from this little book than nearly every other book I've ever read. Makes you wonder: Did C.S. Lewis interview Satan?
Flatland: For the mathematician in all of us
Mac OS X for Unix Geeks: Never do "sudo rm -fv /" unless you are REALLY stupid. (Basically DOS's "format *.*")
The Hitchhiker's Guide to the Galaxy: Because you should never ever ever go anywhere without your towel.
MrToast