Zombies vs Unicorns, Yeah That's Right

I'm not much of a horror book fan, but Zombies vs. Unicorns balanced it out with humor. The two editors try to convince the reader that one or the other is better. Some of the stories are (to quote the editors) "haunting," while others are for pure enjoyment. Many of the main characters are young adults under 18 and so this book is geared to that audience. It shows that strength and good sense can happen at a young age as these characters face adult situations (mainly in the post-infection worlds of the zombie stories). I am well past YA age but I enjoyed the stories. It made me wonder, though, what is the lure of such dark fantasy for this age group? I would be very hestitant to let my 14 year old read this.