"Grace Harlowe's Overland Riders in the Yellowstone National Park" by Josephine Chase is a novel written in the early 20th century. The story revolves around a group of young adventurers, known as the Overland Riders, who embark on a journey to explore the wonders and challenges of Yellowstone National Park. The characters, including Grace Harlowe, Lieutenant Hippy Wingate, and their companions, find themselves embroiled in unexpected twists and turns as they navigate their way through various escapades and mishaps. The opening of the novel introduces the Overland Riders arriving at Cinnabar, marking the beginning of their summer expedition. The group faces immediate challenges when their expected guide, Jake Coville, is missing, and they are astonished to discover that the stock car contains the wrong horses. Hippy Wingate quickly takes charge as tensions rise over their missing mounts and the potential for delays in their plans. Amidst humorous exchanges and banter among the group, they must confront the reality of their situation while remaining hopeful for the adventures ahead in the enchanting yet unpredictable wilderness of Yellowstone. (This is an automatically generated summary.)