The Case of the Midnight Stranger
by Kathleen Pennell
While everyone sleeps, a mysterious stranger moves into the old Johnson place. Amy Jo and Becky collect convincing evidence that the man is a criminal. But, when they approach Chief Higgins, he is strangely reluctant to follow through with an investigation. Against Chief Higgins strict instructions, the Pony Investigators return to the quarry where danger and capture await them.