Pulitzer Prize-winning journalist Tim Weiner has a talent for getting clandestine government agencies to spill their secrets. After dissecting the Central Intelligence Agency in Legacy of Ashes, for which he won a National Book Award, Weiner now turns his sights on the Federal Bureau of Investigation’s intelligence activities in Enemies: A History of the FBI. Those who watched the 9-11 Commission hearings during which the FBI was criticized for being no more than gumshoe detectives might be shocked to find that the FBI engaged in clandestine anti-terrorism and counter-espionage right from its very beginning in 1908.