If you want an interesting take on zombies, read The Rising by Brian Keene. It was the first real zombie book that I read that made me "fall in love" with the whole genre. Its a bit rough, but its good. And his zombies have an interesting twist. All his books do. Also don't discount the Jonathan Maberry Rot and Ruin series because it is young adult. My husband loved it. Maberry also has Dead of Night which is a more adult zombie book.