E. Douglas Branch (1905-1954) is also the author of "The Cowboy and His Interpreters," His mentor, J. Frank Dobie, is the author of many books, including "The Voice of the Coyote" (available as a Bison Book). New to this edition is an introduction by Andrew C. Isenberg, an assistant professor of history at Princeton University who is writing a book-length study of the bison.