Title: Young Cam Jansen and the knock knock mystery
Description: Eric's Grandma Minnie and Grandpa Max keep hearing someone knock at their door, night and day, but find no one there, so Cam tries to solve the mystery using her amazing memory.
Subjects: JUVENILE FICTION / Family / Multigenerational, Grandparents, Juvenile fiction, Readers (Primary), Fiction, Cam Jansen (Fictitious character), JUVENILE FICTION / Mysteries & Detective Stories, Memory, JUVENILE FICTION / Reader - Beginner, Mystery and detective stories, Children's fiction, Grandparents, fiction, Jansen, cam (fictitious character), fiction