Coraline is a neat little story about a girl who does what all girls in stories like this do, which is open a door she isn't supposed to and find herself in a creepy mirror world that masquerades as ideal but is actually more sinister than that. Okay, so maybe it's not always that specific, but you get the drift.
Not surprisingly, Gaiman crafts this dark fairy tale without sugarcoating the story; it's more Pan's Labyrinth than Alice in Wonderland. For a child in the hands of Gaiman, danger is exciting. Not a bad thing. Not really.
As I was reading and imagining the world on the other side of the door, I thought, "This would make a really cool movie! Because imagining is so taxing on the brain. I wish I could just see it!" And it turns out the movie comes out next year! Directed by the guy who did Nightmare Before Christmas and James and the Giant Peach, all done in stop-motion. So that should be pretty sweet.