The Lost Wagon Train Retta Barre's not the first 12-year-old girl to travel the Oregon Trail. And she won't be the last. But for something that's supposed to be the grandest adventure of her life, the long, slow days sure are dull. Thick dust, irritating bugs, and picking up buffalo chips are not the stuff of the action-packed penny novels she loves to read. When things change in Retta's life, they change fast. A simple trip into the prairie brings both adventure and big time trouble. Soon Retta is the talk of the wagon train and her friends don't want to miss her next caper. To be sure, she won't let them down.