I used to love the Hunger Games, but in my opinion the movie ruined it. Not the movie so much, but the movie's fanbase.
I liked the Percy Jackson books (stayed up till 2am reading them over the summer a few years ago)
I read the Deltora books when I was younger.
Night by Ellie Wiesel is also a good one, and the interview with him by Opera almost made me cry.
Lord of the Flies was, although a little slow to start, had a very good message and thats what I love about the book.
Fahrenheit 451 is also a very good book with a very good message.
And Brave New World which, despite the issues in it (such as free love etc.) making me angry, again was a very good book.
And, finally, my
hands down favorite book:
1984 by George Orwell. If I had to choose one book that everyone had to read, it would be this book. I had been meaning to read it for a while, and when I finally did, I was absolutely in love with the book (even though I nearly tore the book in half at the last 4 words) Its a truly amazing book and, in my opinion, a work of art.
Right now I'm trying to read both The Republic by Plato and Common Sense by Thomas Paine.