A fun resource-history book about Grand Canyon National Park. An excellent way to learn about the history, geology, and the wildlife. It is hands on learning following 4 teens spending the summer at the National Park. They learn about Canyon history, geology, wildlife and the American Indian culture. The story includes a mule ride to the river, hiking to an Indian village and biking to several Lookouts. The Goofy Girls meet two boys, Bucky and Billy, living at the Village. Theyt are willing to show the girls the sights. Then an investigation of a suspicious occurrence leads to more excitement. The 2 Goofy Girls and the boys experience a mountain lightning storm, cooking over a camp fire, being kidnapped, and a high speed chase. A big German Shepard they met brings help and they end up helping to solve a crime.