My full review is here on my personal website. I'll post a few excerpts here, though:

4.0 out of 5.0 stars

The very worst thing about this book was just it’s misfortune to be read immediately after I finished “Bumped.” The two books had the same basic theme of a virus damaging young people… Also, it’s possible that I’m forgetting a detail or simply missed it, but I don’t remember there being an explanation of why North America is the only continent left on the planet. O_o

The very best thing about this book is the virus in this book actually kills the people at twenty and twenty-five years of age for girls and boys respectively. There isn’t a real reason why, but the book is certainly interesting. I think I have a soft spot for dystopian books – even the “soft” ones. I’m really looking forward to the next book which is due out next February. Long wait. *cry*