"The Pony Rider Boys in the Alkali; Or, Finding a Key to the Desert Maze" by Frank Gee Patchin is a children's adventure novel written in the early 20th century. This book continues the escapades of the Pony Rider Boys, a group of adventurous young friends, as they journey through the enigmatic Nevada desert under the guidance of a plainsman named Tom Parry. The narrative follows their explorations and encounters with the unique challenges presented by the rugged desert terrain. The opening of the story introduces the boys as they make their way toward the desert, their spirits high despite the foreboding heat and the mysterious beauty of their surroundings. Tom Parry, the skilled guide, shares his concerns about potential storms and teaches the boys to read the desert's signs. The group exchanges playful banter, hints at previous adventures, and exhibits a mixture of excitement and apprehension about what lies ahead. As they encounter their first challenges, including a tragicomic incident involving one of the boys falling into an alkali sink, the stage is set for the unpredictable adventures that await them in the treacherous but alluring desert. (This is an automatically generated summary.)