The Hardy boys go to the Pocono Mountains to help a friend of their father find out what is behind the mysterious happenings at Black Hollow, and in the process

When dogs and men suddenly disappear, and strange screams fill the night, fantastic stories of vengeful ghosts are almost believable. It is these strange happen

The disappearance of a retired police captain, two empty shotgun shells and a series of bloodcurdling cries plunge the Hardy boys into adventure in the Pocono M