Not really a book, but more of a manga. It was manga from a while back, I read it as a kid and still loved it now. It was called "Psyren", a story of people being thrown into an apocalyptic world of psychics and other crazy. The story was technically cut short and had to be wrapped up, but it was still one of my favorite.
The one part that always make me cry, even to this day, was one of the most touching and beautiful scene I've ever read in a manga, especially cause of how messed up (as in sad) part of the story was. It was a reunion scene, and I don't think I've ever cried as much as that one scene. I'm tearing up just thinking about it right now.
Dammit Kyle...