Four stars. The fifth is lacking because my favorite character died-and I couldn't read the last page because of the tears blurring my eyes-a rare embarrassment. 
 The book basically takes up where Rot & Ruin left us-Tom is training the kids to be "modern samurai" and they want to pursue the jet (see the first book). 
 The action (and zombie violence) stars right up, but this time we have a more mature Benny (and emotionally damaged Nix) to confront it. 
 The authentic maturity of the characters is a breath of fresh air, far beyond most other YA fiction. I really have to hand it to Mr. Maberry-a zombie novel with mature characters, deep themes, and touch-you-so-deeply you cry moments? Now that, in an incredible achievement. Oh, and for writing a sequel that kept up with a first-another rare thing. 
 A worthwhile read whatever your stance on zombies, or your age (although I recommend that no one under 12 read this)