I'm going to put this one at 3.75. 
 I thought it was very interesting, and in the beginning, I was engrossed. Then I came to realize that I wanted to read more on some of the characters - like this was one ginormous tease. I'd really like more of the warrior monks - blind Sensei Ijiro and Kondo. And Choi, the deep sea diver, as well as several others. 
 Seeing the Zombie War from all over the world, and how different countries and people dealt with it made this book stand out, but I think I still prefer my stories to follow specific characters.