Book excerpt: James Callahan entered Texas armed, a quixotic young man enlisted in the Georgia Battalion for the cause of independence. He barely survived the 1836 Battle of Refugio and the Goliad Massacre. Undaunted by the perils of his adopted home, he remained in the line of fire for the next twenty-one years, fighting to protect Texas settlers from Apaches, Comanches, Seminoles, Kickapoos, outlaws, mavericks and the Mexican army. As a Texas Ranger, he rode with the legendary men of Seguin and San Antonio. In 1855, he commanded the punitive expedition into Mexico that bears his name, a fiasco that has been shrouded by mystery and shadowed by controversy ever since. In this first-ever biography, Joseph Luther traces the tragic course of the wayfarer who crossed so much of the Texas frontier and created so much of its story.