Nathaniel Philbrick, The Last Stand

If you're studying Indian affairs and the fate of the frontier, it's inevitable you'll read about Lt. Col. George Armstrong Custer.

See Nathaniel Philbrick, at Amazon, The Last Stand: Custer, Sitting Bull, and the Battle of the Little Bighorn.

(I'm continuing with Robert J. Utley, The Indian Frontier of the American West, 1846-1890, which discusses Armstrong beginning in Chapter 4.)