The Forest Rangers in the High Sierras have a big job, as young Brad learned from his father. His summer apprenticeship at a ranger station teaches him how hard a job it is. Brad makes many blunders in the first weeks, but comes out on top after his hunches prove right about the mysterious fires, the broken telephone wires, and the missing beef cattle. The United States Forest Rangers may prove an inviting career to young men who have felt any interest in an outdoor life. Details of the day-to-day jobs, adventure, personalities that are not as wooden as those usually found in ""Westerns"" and a generally sustained interest in the story of who stole the cattle and where was the meat hidden. Brad solves the mystery and wins his badge. Rather less than average length adventure story with career values.