"Over several decades, Baer served as an operative, from Iraq to New Delhi and beyond; notably, his career was the model for the acclaimed movie Syriana. In The Perfect Kill, he takes us on a serpentine adventure through the history of political murder; its connections to, and differences from, the ubiquitous use of drones in state-sponsored killing; his firsthand experience with political executions; and his decades-long cat-and-mouse hunt, across...