I'm trying not to talk about one thing too much threw out this whole challenge. But in all honesty the book that was turned movie that I think was compleatly ruined the most was City of Bones by Cassandra Clare. The casting was all wrong. The writing wasn't all that great. And they tried to change things way too much. All in all they tried too hard to make it the next big thing. I feel that if they would have stayed truer to the story and not rushed everything it would have been a whole lot better then it is.