This is also my favorite genre of movies and books. I have not been reading much lately but I actually just picked up the book World War Z. I am not too far in yet but very good so far. This is also the one that was made into a movie staring Brad Pitt that is coming out June 21st.
absolutely excellent book.
I don't have high hopes for the movie, but I read that apparently they are hoping to do a trilogy and have the next two movies more closely follow the novel.