The first four waves of alien invasion killed off most of the population of Earth. Now the survivors are trying to pick up the pieces and prepare for whatever's next. This book follows Cassie's story as she tries to reunite with her younger brother and avoid the alien assassin who has been following her.
This is a very long book, and as such the author did not spell everything out at the beginning. It takes a long time into the book to understand what happened in the first four waves of attack and how the people are preparing for the inevitable next attack. I enjoyed this story, but I could see its length making it a hard sell to any but my strongest readers.
Recommended for: fans of Hunger Games and Ender's Game, young adults
Red Flags: lots of violence
Overall Rating: 4/5 stars