Check out Entertainment Weekly's review.
Taken as a fluff piece on zombies, Brooks' book is enjoyable. But the underlying themes of the work depressed me--that government is criminally inept, that the wealthy are a bunch of pigeon-holed specialists unable to adjust to dramatic change because their sense of entitlement confounds their problem-solving faculties, that the military would be entirely incapable of destroying a thought-less, strategy-less enemy. Brooks makes several oblique references to current events, all in the same context of the oh-isn't-our-government-inept meme.
I'm not thrilled. Unless you like zombies or fictionalized, hackneyed war accounts, I'd skip this one.