Mari Sandoz (1896-1966) is the noted author of "Cheyenne Autumn," "Old Jules," and "The Battle of the Little Bighorn," all available in Bison Books editions. Michael Punke is the author of several books, including "Last Stand: George Bird Grinnell, the Battle to Save the Buffalo, and the Birth of the New West" and "Fire and Brimstone: The North Butte Mining Disaster of 1917,"