Death at Sombrero Rock — John Dyson

Red Ant and his Comanche warriors ride down from the mountains and bring destruction to isolated homesteads. Former US Deputy Marshal Black Pete Bowen wants only to live peacefully with his young wife and son, but he is forced to take the war to the enemy. Crossing the Rio Grande, he attacks Mexican bandits who are supplying the Indians with whiskey and guns. Pete also has other problems to handle, which lead inexorably to a tragic holocaust.