Fire - Book 2 in the Graceling series. I really liked the 1st book, but was having a hard time getting into this one, at first. Once you reach the middle, things start to get interesting. Now I'm on to book 3:0)
The Dark-Hunter Series is awesome if you like vampires. There is romance, action, history/mythology and even comedy. They are for adults though, not "dirty" but not really something I would let my teen read either.