Penguin Young Readers 3 - Young Cam Jansen and the Knock, Knock Mystery
by Adler, David A
Cam, her best friend Eric, and Eric's mom are spending the day with Eric's grandparents. But Grandpa and Grandma seem too tired to visit. Every so often, a knock at the door wakes them up. But when they go to answer, no one is there. Is a Knock, Knock Ghost on the loose? It's up to Cam to solve the mystery!
Format: Soft Cover
Publisher: Penguin Group