The Shadow Year by Jeffrey Ford

Well, this adult mystery got me thinking, which is a good thing. But I'm not sure if it's a great book or not! And I hate that. The boy has an older brother who can beat up anyone and a younger sister who is just a little strange. She pretends to be someone else and "knows" things. When a peeping tom is seen around the neighborhood, the siblings decide to solve the crime. Using a model of their town, the three create clay figures of their neighbors, the cars, and the houses. But then a classmate goes missing. And someone else dies. And the peeping tom is still around. A lot happens during the Shadow Year, so if you lie subtle suspense and mysteries, this one is for you!