This gripping non-fiction narrative delves into the heart of the Cold War, recounting the incredible true story of Oleg Gordievsky, a high-ranking KGB officer who became the most valuable double agent for the British MI6. The book masterfully chronicles Gordievsky's secret work, which significantly altered the course of international relations, and the harrowing operation to exfiltrate him from the Soviet Union after his cover was blown. It's a tale of espionage, bravery, and betrayal, showcasing the complex moral decisions involved in the shadowy world of intelligence and counterintelligence, and highlighting the personal sacrifices made in the name of peace and security.

The 9934th greatest book of all time