Well, okay,...

Fox, Richard A.Archaeology, History and Custer's Last Stand. 1997.
Utley, Robert M. Custer and the Great Controversy. 1998.
Donovan, James. A Terrible Glory: Custer and the Little Bighorn. 2009.
Scott, Douglas D. They Died With Custer. 2002.
Taylor, William O. With Custer at the Little Big Horn. 1996.
Hardoff, Richard G. Hokahey! A Good Day To Die. 1999.
Marquis, Thomas B. Keep the Last Bullet for Yourself. 1976.
Michno, Gregory. The Mystery of E Troop. 1994.
Brown, Dee. Showdown at the Little Big Horn. 1988.
Skelnar, Larry. To Hell With Honor. 2000.

Yes, I own them. Yes, I've read them. I do have other books which touch on the subject, but these are most immediately germane.