So many kids attend Elmwood Elementary School that this year the entire third grade class has been moved into a separate building — the old Blackwell mansion. Or as the third-graders call it, the spook house. It is a monster of a building, with towering gables and thick-glassed windows. Adam and the other students of 3-B have class in what was once an enormous bedroom, complete with a fireplace and rumored, like the rest of the Blackwell mansion, to be haunted. Sounds hard to believe, right? But in class 3-B, sometimes the walls groan and the lights flicker and pencils mysteriously roll off of desks. The class is given committee work and divided into groups assigned to different projects. Adam and his friends are assigned to the psychic investigation committee and given the task to uncover what exactly is going on at the Blackwell mansion. These third-grade ghost hunters look through old newspapers, conduct interviews, and visit the local historical society to find their answers. But only when they decide to enter the Blackwell mansion at night do Adam and his friends finally discover that the building isn't haunted — it's sinking! And if they can't alert the authorities in time, they might end up losing the only school they've got. Young readers who enjoy a good mystery will certainly appreciate Grace Maccarone's story. There are enough twists and red herrings here to keep even the most avid of detectives guessing. Maccarone also manages to capture the banter and relationships of these third-graders, who find that their task to understand the secrets of their school ends up helping them understand each other as well.