Another finished book about zombies, The Zombie Survival Guide (from Max Brooks). It was written before World War Z so I have been able to compare things on both books in inverse order (I've readed first WWZ).
This book tries to be a "serious" guide to defend yourself from zombies. As simple as it sounds :D
It is sometimes funny, and has a bit of black humour on it, but mostly tries to be as serious and applied as possible.
It gives all sort of advices, from how to defend your home to how to establish a contingency plan, how to "attack" and raid zombie-infested zones, tactics, and some historical zombie attacks (backgrounds for the supposed guide ;)
So basically we can say the book is 85% a manual of "how to live fighting zombies on a daily basis" and 15% a collection of zombie short-stories themed in the past.
The guide is really well documented, so much that a movie director wanting to do a zombie movie could use this guide as a manual of "how to make a zombie movie". Some tactis explained are funny but clever ones.
Some of the stories are really well thought and even scarier than the future depicted in World War Z (the one of the slaves ship is my favourite), and look like the seed that Brooks planted for WWZ (or maybe was a "playground" to see how well could he tell small zombie tales?).
If you enjoyed World War Z, or just like zombie movies, go grab this book before the apocalypse comes!