I like anything written by Stephen King, Michael Crichton, Palahniuk, in particular
Survivor - Chuck Palahniuk
The Man Who Was Thursday - G.K. Chesterson
The Andromeda Strain - read it in 6th grade!
Chatter - Patrick Radden Keefe
Digital Fortress - Dan Brown
1984 - Orwell
Brave New World - Huxley
Confessions of a Street Addict - Jim Cramer
I, unlike most readers, didn't really like The Davinci Code series of books Dan Brown wrote. I liked just about any other book he's written though. And no, it's not because of "religous heresy" or anything, It's just that I couldn't get into them.