"The Outdoor Girls at Rainbow Lake; Or, The Stirring Cruise of the Motor Boat Gem" by Laura Lee Hope is a novel written in the early 20th century. It follows the adventures of a group of young girls who are excited about a surprise visit from Betty's Uncle Amos, a former sea captain, who promises an amazing experience. The story sets the stage for their summer cruise, filled with camaraderie, potential danger, and the thrill of exploring nature. The opening of the novel introduces Betty Nelson and her friends, who eagerly await the surprise Betty has in store for them. As they chat under a hammock on a warm July day, their playful banter hints at their unique personalities. Betty reveals that her uncle will be visiting, stirring curiosity and excitement among the group. Additionally, as Grace must go fetch important papers for her brother while on horseback, a sense of adventure begins to unfold. The stage is set for the girls' upcoming adventures on the motorboat Gem, as they prepare for their journey to Rainbow Lake and deal with unexpected twists, including the intriguing hint of ghosts at Elm Island. (This is an automatically generated summary.)