Peter and Connie Rooptogether they have written more than eighty children's books, including Going to Yellowstone; Sacagawea: Girl of the Shining Mountains; Buttons for General Washington; and Off the Map: The Journals of Lewis and Clark.Mr. Roop, a former elementary-school teacher, was Wisconsin State Teacher of the Year and now writes full-time. Ms. Roop teaches high-school science and was named Appleton, Wisconsin, High School Teacher of the Year. Peter has been a Missouri River guide as well as a lecturer on a Mississippi River steamboat. The Roops have paddled up, rafted down, and cruised upon the rivers in this book. They make in Appleton.