Bod Owens' life is detailed in the book, and it is often lonely and macabre. Neil Gaiman is the author of Coraline, and like Coraline, The Graveyard Book is dark, even in it's child-like story. Bod is no older than 15 when he leaves the safety of the graveyard, and he leaves a hero. However, he's still an orphan, he still has no name, and he loses the only family he's ever known the second he leaves the graveyard for the last time.
What I was left with was a sadness. There was no triumph. There was no heroic victory. There was simply life: and life was the end of the beginning, but the point of the entire book. All in all, I recommend it. It's a nice, quick read, but it's thoughtful, and it's not a warm-fuzzy book. Emotionally, it's quite detatched, and perhaps it's better that way. After all, life doesn't begin in a graveyard.
I'd recommend this book for students in middle school. It's not hard reading, but it's not a comfortable subject.