Cam Jansen and the Chocolate Fudge Mystery (Cam Jansen Adventure)

Summary: Knock, knock. Who's there? Cam Jansen detective. Selling candy door-to-door turns into a new case for Cam to crack. When she spies a suspicious-looking woman in the neighborhood, this junior detective knows something is not quite right. Eric thinks she may be overreacting, but Cam knows a mystery when she sees one!