A Clockwork Orange was my favorite book at one point in high school, too. It's probably the only great book where the movie did it justice. I read a lot more essays and feature stories than books, but here are a few good books for anyone looking:
Vladimir Nabokov, Lolita: Shoutout to @
TYSON. This is probably my favorite book ever, though.
Tom Wolfe, Bonfire of the Vanities: If you've never read Wolfe, you should read Wolfe, even if it's just one of his essays.
Jonathan Franzen, The Corrections: The plot is pretty slow-moving, but this probably is the most well-written book I've read.
Paul Auster, The New York Trilogy: Three novellas usually put into one volume now.
Jeffrey Eugenides, The Virgin Suicides: Again, this is my favorite of his three great novels.