When James Moore joined the ATF in 1960, it was an arm of the Internal Revenue Service with one job: to catch the Mafia bootleggers whose distilleries cheated Uncle Sam of millions in tax revenue. During his twenty-five years of service, Moore saw the organization shift to enforcing of gun laws, be reborn as a separate bureau, and take on bombings and arson cases that most law officers wrote off as impossible to solve. Moore's personal, from-the-hip...