I think Lord of the Flies is one of those books you need to read in fifth grade as a formative literary experience, rather than coming to it as a well-read adult.
I'm reading Cloud Atlas right now because I loved the movie. I got hung up on the Sloosha's Crossing segment for a while, because it's like reading fucking Swedish, but once I got over the hump I've been powering through it. I'm fascinated that someone decided to write this book and that the Wachowskis decided to adapt it. It also strikes me that the Wachowskis are really good at adaptation, arguably moreso than writing original stories.
I'm also trying to read J.K. Rowling's new novel The Casual Vacancy. It's...ugh. On the one hand, I'm giving in the benefit of all the doubts, not expecting it to be Harry Potter and taking it on its own terms. On the other hand, were it not by J.K. Rowling I would have given up on it completely by now because it's just not that interesting. I'm hoping it'll get interesting, but if it hasn't done so by the halfway point I'm just going to walk away.
Speaking of HP, I've also been reading the Percy Jackson and the Olympians series, which are not as flagrant a rip-off as I expected. They're also not quite as clever or richly-developed, but they're entertaining and inoffensive, good for light reading and palate-cleansing between meatier tomes.