Kathleen Pennell, Lauren Pennell
The Case of the Secret Passage
language
(Paddock Publishing May 13, 2013)
Astride their ponies, Ginger and Oreo, twelve year olds, Amy Jo and Becky solve mysteries and crimes . While housesitting at the Funderburg home, Amy Jo and Becky discover a hidden door leading to a series of underground tunnels. Strange markings on the tunnel wall, visible only with a black light, lead them further and further into the passageways where the Pony Investigators uncover a fiendish plot. Before they can warn the police, the girls are caught in a trap where there seems no possible way of escape.