I'm only going with 5 because they're the only 5 books that immediately came to mind as being special to me

5. Battle Royale - Koushun Takami
4. The Thin Executioner - Darren Shan
3. 1984 - George Orwell
2. Burned - Ellen Hopkins
1. Exit Here - Jason Myers

The Demonata and Percy Jackson series are also gr8

There's also this one book about a kid who sets another kid on fire that I liked a lot but I haven't been able to find it again so :/