World War Z is not about zombies...not really. It is more about humankind, about its societies, about its military, about its struggle - about its people. The book consists of stories told in retrospect by individuals who survived. They tell their stories and with it the story of the "Zombie War". The story unfolds more or less chronological, starting with the first sightings in China. Since it's told in retrospect the reader gets bits of information about the postwar world as well and early on a sense of the magnitude of the "war".
There is no character development on the long run, but you get an insight into the individual storytellers - and the zombie's characteristics: What they can do, and what they can't do.
The book is brilliantly written and draws the reader in right from the beginning. Because of the book's set-up as an eye-witness report, it makes the events sound more "real" more "possible to happen", which makes it even more scary! Nicely done!