I'm not a zombie fan, and I wouldn't have cared about this book at all if my fellow readers weren't gushing over it. So I figured, why not? Zombie love story? Okay. 
 R (whose memories were erased and thus can't recall his name) is a zombie. And he's a little sad and pathetic in the beginning. The prose is kind of ridiculous; he talks of his staggered lurching and eating flesh and his mindless zombie activities. They get pleasure out of eating brains, because the brain provides a snapshot of a person's life. They can live vicariously through these memories, albeit briefly. 
 But when R eats Perry's brain, it sticks with him. And he's about to eat Julie, the girl Perry was with, but something in his brain (or, rather, Perry's) makes him save her. Something is changing within R; he wants to protect her. 
 It's fascinating watching the prose develop. It's choppy in the beginning, from the zombie's point of view, but as R starts understanding things it becomes more concrete. Like the book itself is turning into something, much like R is. 
 It's meant to be a love story, and while I didn't believe the "love" part I did like watching R develop. I didn't care much for Julie, and there isn't any reason R should, either. His attraction to her is because he ate her boyfriend's brain. But for a post-apocalyptic end-of-the world tale, it's not so bad.