Lev Grossman's The Magicians was fantastic!
The main character, Quentin, is a genius who is unhappy with his lot in life. As a high school senior he feels constantly the outsider and not at ease anywhere. When he finds himself walking from a city park into a magical college to take an entrance exam his world is turned upside down. It emphasizes those feelings of self-discovery and right & wrong that all of us go through. (Note that this is NOT a kid's book!)
Think Harry Potter in college or spring break goes to Narnia and you have it. Dark in places but still fun enough to keep you reading. The end was totally unexpected which I really like in a good read.
