I love Neil Gaiman. LOVE HIM. However, this is not my favorite book. I read it based on a suggestion from a blog about spookiest books. I think this was intended to be a scary kids' story?
Anyway, it was also a movie and while definitely spooky, it was a disappointment to me. But I do LOVE Neil Gaiman. Check out Stardust instead.
In this book, somewhat neglected Coraline enters an unused part of her house and emerges in an alternate reality where everything is *almost* the same, but the people have buttons instead of eyes.