My favorites so far are world war z and zombie survival guide by Max Brooks. I just bought Patient Zero by Jonathan Maberry, The Living Dead which is a collection of short stories by famous authors such as Stephen King, and Pride and Prejudice and Zombie by Jane Austin and Seth Grahame-Smith.
Give me your take on this books if you have read them.
Also if you have any favorite undead themed books yourself, don't be afraid to share!!!
Monster Island is a good one by David. Wellington,,
right now ive started the 2nd book by him, Monster Nation wich is a prelude to Island.
They do have the quite the twist to them, and they always keep your attention
(zombies, 18yr old Japanese mercenaries in school girl outfits with AK's, Warlords, Napalm, NYC...)
WHAT MORE CAN YOU ASK FOR IN A BOOK xD