Hitchhikers Guide to the Galaxy by Douglas Adams, the single funniest piece of literature ever.
I also like political non-fiction like On Liberty by John Stuart Mill. Kicking Ass in Canadian Politics by Warren Kinsella was also an excellent read, one of those books that every time I put it down, I'd be back 15 minutes latter.
Although, this summer, I'm gonna tackle Crime and Punishment so that could change everything.