I liked the mystery that revolved around Derric's accident, but the truth was kinda a let-down. It was exciting when Becca found Derric, but the plot got dragged out to much, and was buried under other problems. I liked the idea of Rejoice, that was sweet, but Derric did the classic 'blame yourself' thing, and it didn't work that well.
I think Becca over reacted to a lot of things, and sometimes took things to seriously. Running away from the Sheriff is often not best solution, especially if she did nothing wrong involving Derric. I know that she was worried about her father, but running away draws way to much attention to herself than telling the police what had happened. She also didn't do things for herself, and dragged others into her mess, like Seth.
The ending was a big let down. Derric is older than Becca, who was 14, and it just went to fast, especially since it was the end of the book. So much was left unsolved, and we didn't get to know some things that I really wanted to know, like what happened to Hayley's father, and why Diana didn't have whispers. To much things weren't explained, and that saddened me greatly.