"Nancy Greenspan dives into the mysteries of the Klaus Fuchs espionage case and emerges with a classic Cold War biography of intrigue and torn loyalties. Atomic Spy is a mesmerizing morality tale, told with fresh sources and empathy." --Kai Bird, author of The Good Spy and coauthor of American Prometheus: The Triumph and Tragedy of J. Robert Oppenheimer The gripping biography of a notorious Cold War villain--the German-born...