At first I really didn't like this book and didn't think I could. I found Gwyn to be a really immature character. All the characters her age acted as though they were twelve, and some of the choices she was making just did my head. The weird thing is, I'm not sure when my mind changed about her because by the end I thought she was a nice kid. I think maybe she stops making so many dumb choices. (There's a good chance it was in between one of my bouts of vomiting which leave me feeling pitiful and sympathetic. I have the worst hangover ever) 
 I liked the time travel thing and I thought the past was described really nicely. Things like that tend to get boring quickly but that didn't happen. I'm looking forward to getting some answers from the next book.