YOU ONLY LIVE ONCE...MAYBE TWICE!
I know it's not a zombie novel (and is a few years old), but I just finished David Moody's Hater and found it to be an excellent read. There were a couple moments where the main character's moaning about his position in life got a little tedious, but once it got rolling it was hard to put down. I loved the moral conundrum that the main character faces after he experiences what many of the other people are feeling.
If you have time, I recommend you check it out.