Mule Train Mail Author:Craig Brown While working on this book, Craig Brown traveled to the Grand Canyon to observe the only mule train delivery route in the United States. Mule Train Mail introduces readers to Anthony Paya, who wears a cowboy hat, chaps, and spurs, and leads a train of mules on a daily three-hour trek down into the Grand Canyon to bring mail to the townspeople of... more » Supai. A portion of the sales will be donated to the Havasupai Head Start program to help children in Supai develop early reading skills.« less