Eleven Colt related books. Some titles to include "Colt Peacemaker Encyclopedia" Volumes 1 & 2 by Keith Cochran, "Colt Single Action Revolver Handbook 1955-1975" by Don Wilkerson, "Colt Single Action Army Revolvers - U.S. Alterations" by C. Kenneth Moore, "The Book of Colt Firearms" by R.L. Sutherland and R.L. Wilson, and "A Study of the Colt Single Action Army Revolver" by Ron Graham, John A. Kopec, and C. Kenneth Moore.