Read Nabokov. If not Lolita, then Invitation to a Beheading. I insist.

Handmaiden's Tale by Margaret Atwood was astonishing. Instant top 10 favorites for me.

Quite loving Farewell to Arms by Hemingway as well.

Not much of a play lover usually, but Euripides: Medea is hot stuff as well. Just wrote a whole paper on it and I'm still keen on it. If you're into ancient greece, I'd go for it.

Battle Royale, for a fun read, if you like dystopian novels. I think half of the ones I mentioned are dystopian though, so if you dislike them then I'd go with just Hemingway and Euripdes.