The book is about zombies, in that it is the over-arching theme, but what's going on is the story of these people and how these survivors deal. I think that's so much more of an interesting story, and that's what really gets and hooks these readers into the book and the show. It's a mix of fans of drama, fans of AMC, fans of horror and fans of Frank [Darabont]. It's a lot of people just coming together and realizing a genre doesn't have to be fixed in one specific detail.