I heard through the grapevine that 'World War Z' was the book to get, and it is very good, but left me hungry for more...[BRAINS that is!] Did you know that it was written by Mel Brooks son- Max Brooks!?
So I researched a bit on amazon and found another series that had high ratings. I put it on my wish list...and my lovely wife got them both for me last Christmas. The second one is 'Day by Day Armageddon' by J.L. Bourne. I'm looking forward to reading it next so I may let everyone know what I thought!
I don't know why but I totally got into Zombies in the last couple years! It helped that I watched '28 days' and played the pc game 'Valve's Left4Dead' quite a bit! Also Plants Vs. Zombies is a pretty fun game to pass the time with!