Coraline...It's about a little girl who discovers an alternate world through a door in a new flat she and her parent move to. It's light creepy, think the target audience is teenagers. But, I read all his stuff, since it's all really good.
"Night of the Living Dead"? Sorry - Meant to say Evil Dead. So many dead I got confused.
You might have to post another clue cause all aging yourself made me think of was "Death Becomes Her".