Samuel Benton Barron, The Lone Star Defenders, A Chronicle of the Third Texas Cavalry, Ross' Brigade.

Victor M. Rose, Ross' Texas Brigade, (Kennesaw, GA: Continental Book Co., 1960.)

Douglas Hale, The Third Texas Cavalry in the Civil War, (Norman, OK: University of Oklahoma Press, 1993, ISBN: 0-8061-2462-8.)

Douglas John Cater, As It Was: Reminiscences of a Soldier of the Third Texas Cavalry and the Nineteenth Louisiana Infantry (State House Press, 1990, ISBN: 0-938349-47-3.)

Here are a few to start with. Be sure to check notations and bibliographies of these for more sources.

Happy Hunting!