In the book "In the Three Zones" by F. J. Stimson, the protagonist, a commercial traveler, embarks on a journey through the Southern mountains and river valleys of America to sell snuff. The narrative delves into the protagonist's experiences as he navigates the diverse landscapes and encounters various characters along the way. The story unfolds against the backdrop of the protagonist's personal and professional growth, as he grapples with the challenges of his trade and explores the complexities of the regions he traverses. Through vivid descriptions and engaging storytelling, the book offers a compelling exploration of the cultural and geographical tapestry of the American South during the late 19th century.