I don't think you should read anything about this book beforehand, just pick it up and enjoy diving into the magic and get scared - after all, it's a story by Neil Gaiman. If you have the chance, listen to the audio because it is read by Gaiman himself and he did an amazing job. And mind you, I rarely listen to audiobooks because I think they are boring and rather read the books myself.

That being said, this book is about a 7 year old living amongst adults he doesn't understand and how he came to have a hole in his heart. I won't say anything else about this story, except that Gaiman has an incredible affinity with children's way of thinking and that I got more scared reading this than I care to admit. Great book!