World War Z is written in a multiple points of view, documentary interview style and covers the entire war period, from case zero through the aftermath. The interviewees are from different walks of life and all around the world.
It is, quite frankly, the best zombie novel I have read and probably my favorite fiction title. While a good two hour adaption could possibly be made, it will necessarily have to abridge roughly 85% of the material, if it uses any of it at all. (I fully expect "inspired by".)
The zombie survival guide is much less interesting though. Some versions have a historical section at the end that is pretty good. However the primary section reads exactly like a real survival guide, and is about as entertaining. What it is
good for is setting the rules for Brook's zombies. It might also make for an interesting case study if you like to analyze writing techniques (specifically, how he adapted zombies into a fairly lengthy and legitimate sounding guide).