Listen, zombies aren't realistic. If you honestly think they have to be realistic to be good entertainment, I disagree. One review seems like a poor attempt at trolling.
But you see, zombies aren't supposed to be realistic. Its a good book that these reviews seem to bash for the unrealistic pretense. Yes, Brooks was trying to get it to be realistic. But this book isn't set in the real world, and neither are those zombie films. The author even references why their impossible, but apparently that isn't good enough.
The best thing about this book is the way the world reacts. And that's good enough for me.
I recently reread the book, and while the satire is either offensive or dull, the general story is good. Some were too short, some were too long. But most were entertaining and I recommend this to anyone who liked Romero. But if your looking for a realistic zombie book, I don't think one exists.