"The Boy Ranchers; Or, Solving the Mystery at Diamond X" by Willard F. Baker is a novel written in the early 20th century. This story follows the adventures of Bud Merkel, a sixteen-year-old cowboy, as he navigates life on the Diamond X ranch alongside his cousin, Nort, and his brother, Dick. The narrative involves themes of friendship, the challenges of ranch life, and a hint of mystery surrounding the ranch's cattle and some dubious characters. At the start of the story, readers are introduced to Bud and Slim, the foreman of Diamond X ranch, as they ride back to the ranch after a long day spent repairing fences. Their leisurely ride takes a turn when they notice a thin wisp of smoke and overhead commotion at the ranch, leading to a scene of excitement involving Bud's cousins who have just arrived and an unexpected incident involving a bucking pony named Tartar. The brothers find themselves quickly embroiled in the rugged life of ranching, facing potential danger from cattle rustlers while also dealing with the enigmatic presence of a professor who may not be who he seems. (This is an automatically generated summary.)