This book will be a very easy sell to teens visiting the Library. The parallel stories of Cassie and Zombie (with some interjections from Sammy and The Silencer) give a good glimpse at this post-alien-invasion world and how it effects people on a daily basis. I felt like the end was a little rushed, but perhaps that's necessary for this story. Looking forward to the sequel (this is the first of a series, right??)