I just picked up and finished a very wonderful book called World War Z my Max Brooks. It is a "oral history" of a world wide zombie outbreak. If you aren't a fan of the horror genre I would still recomend it for the imaginative way the author tackles the subject. If you have seen "Shaun of the Dead" I would deffinatly recomend this as some fun light reading.
I've heardof it, but zombies (as parm says) have never been my thing, i like fantasy, but zombie fests just bore me. but there is obviously a market out here for it as it's been quite popular i think.
_________________________ If all the worlds a stage?
zombies...oh look my nose fell off, oh look i have no weapon...i know i will rip my arm off and beat you with it...now im gonna bite you...ha now your a zombie....