Just thought I'd let people know this is in line with "Coraline", his other book for middle school readers. Gaiman is one of my favorite authors by far - he is amazing. But they really need to clarify on the book's page that this is not an adult novel. It still might be very exceptional of course. Whether its one of those juvenile fiction books that also works for adults, I do not know. I will say Neil is one of the best, heck THE best, fantasy author writing today.
Actually if you look at the recommanded age group for the book, you could've deducted it. And it's quite dark for a children's novel. I just finished reading an advance copy of the book and it's completely amazing, like everything else gaiman writes. I couldn't put it down.
I actually truly enjoyed it. It's not as violent as the other Gaiman books and the main character is a young boy, but the same Gaiman wit and humour can be found in every page. If I had to compare it, it'd be more similar to Stardust than his other books.
I've found, especially lately, that the really good writing is going on in the juvenile or young adult fiction. I'm 44 years old & stayed up late finishing "The Graveyard Book" last night. Very enjoyable and well told.