This is a fiction horror novel about a boy who lives in a graveyard and is raised by ghosts. I would only read this to kids in 5th, or 6th grade because it is kind of scary and definitely has complex/mature themes including death and violence. If a 4th grader was mature enough and their parent allowed it, I would allow him or her to read it independently. I think Fountas & Pinnell would level it as a U or V which would be 5th grade. When I read it for the first time in 5th grade it scared me, but I read it again in my children's literature class and it still gave me the creeps! I would definitely have to send home a permission slip before I read this to a class.
An activity could be to have kids decorate their own headstones around Halloween. This sounds super creepy, but I would want them to describe themselves with strong adjectives or to write a short poem to be printed on their head stones. I would hang these on the door around Halloween.