Political Genius of Abraham Lincoln. Simon & Schuster. 2005. ISBN 0-684-82490-6. Goodrich, Thomas. The Darkest Dawn: Lincoln, Booth, and the Great American
True Story of the Fighting Sioux Told in a Biography of Chief White Bull. Lincoln: University of Nebraska Press, 1934. OCLC 250280757 Warner, Ezra J. Generals
Custer's Last Campaign: Mitch Boyer and the Little Bighorn Reconstructed. Lincoln: University of Nebraska Press. 1991. ISBN 0-8032-7040-2. Grinnell, George