Four of the six of us who saw the movie read the book. Had it been called something else, we all agree it was a great movie for the teen set. Language (did not use the f word), heavy sexual innuendo, violence, but a great story, great special effects, and fun. The loud argument from 3 middle schoolers in the car on the way home was how farit departed from the book and why they took elements from all books, made Percy older, and eliminated some of the chance for seqels. IT really had only a half connection to the book: maybe a demi-book film!