A mystery novel written in the mid-20th century. The story features Johnny Thompson, a boy from Illinois, who travels to the Cumberland Mountains of Kentucky and stumbles upon a series of intriguing mysteries, including an old grist mill that produces something unusual from seemingly nothing, and a bear that steals a pig. As he unravels these mysteries, Johnny also discovers the secrets and adventures that await in the mountains, potentially leading to personal growth and excitement. At the start of the novel, Johnny meets Ballard Ball, a local boy working at the mill, and learns of the peculiar activities happening within it. The two form a bond as they explore the area, sharing a sense of adventure marked by Johnny's curiosity about what occurs in the mysterious lower mill. As they navigate through their surroundings, they encounter various challenges, including the possibility of encountering a bear and saving a mule from a perilous bridge, setting the stage for an adventure filled with camaraderie, intrigue, and the promise of untold tales waiting to be discovered in the heart of the Cumberlands.
