Young Cam Jansen and the Knock, Knock Mystery

K-Gr 2—When Cam and her friend Eric visit Eric's grandparents, they learn of a mystery that causes Grandpa Max and Grandma to nap all day. At night, they often hear what they think is a knock at the door, but no one is there when they answer. Cam uses her photographic memory to identify the source of the knocking. Apples fall from the trees around the house, and they hit the roof, making sounds like someone knocking. Cam and Eric not only solve the mystery but also resolve the problem by picking the rest of the apples. Aside from the applesauce, apple pies, and apple cookies made from the harvest, Cam and Eric get satisfaction from eliminating the "Knock, Knock Ghost." The stories in the this series promote logical thinking and helpfulness for young readers beginning to enjoy simple transitional chapter books.—Lindsay Persohn, University of South Florida, Tampa