The Lucky One by Nicholas Sparks. I read this in a weekend in anticipation of going to the movie. I liked the book but, loved the movie They are very, very different form each other. (I want to see the movie again, can't wait for it to come out on dvd!
Nicholas Sparks' Next Movie Adaptation, 'The Lucky One,' Circles In On A Director
Identical - Ellen Hopkins has written many novels in verse. Many are part of a series, but this one is not. Definitely for high schoolers. about Kaeleigh and Raeanne who are identical, each with her own dark secret.