To most Americans, Frank Hamer is known only as the “villain” of the 1967 film Bonnie and Clyde. Now, in Texas Ranger, historian John Boessenecker sets out to restore Hamer’s good name and prove that he was, in fact, a classic American hero. From the horseback days of the Old West through the gangster days of the 1930s, Hamer stood on the frontlines of some of the most important and exciting periods in American history.