Great book, I read it in one sitting.
Same here. Best zombie book I've ever read. I could not put it down. Soon to be a major motion picture -
Sort of sounds like the movie Ever Since The World Ended
. There are no zombies in it but it deals with the aftermath of a global disaster. Also Adam Savage is in it!
You want to read a good book along the lines of what you cited above, try Earth Abides by George R. Stewart. Written in 1949 it's one of the best 'what happens to mankind and the planet after a devastating disaster' books.
I have a copy of World War Z
, and I plan both to read it soon, and to follow it up with this
The Morningstar Strain: Plague of the Dead is pretty good as well.