Excellent nonfiction for history nerds like me. This is the story of a KGB double agent working for Britain during the 70s and 80s Cold War Era. With big time leaders such as Andropov, Thatcher, Reagan and Gorbachev leading the free and not so free world, Oleg Gordievsky risked his life, sacrificed his personal peace and helped orchestrate the downfall of the Soviet Empire. This book reads much like a novel. I was entranced by the spy world.