This book is the true story of Adolf Tolkachev who delivered Russian secrets to the the CIA for seven years during the Cold War. The sheer impact this one spy had on the United States military, specifically in aviation, is astounding. His secrets contributed to the United States’ air superiority throughout the world for long after the Cold War ended and helped topple the Soviet Union. It is an incredible story. As I read the account of Tolkachev, I couldn’t help but wonder how his story ties in with other known spies of the era. People like Aldrich Ames and Robert Hannsen may have contributed to the ultimate downfall of Tolkachev and it is mind-boggling to consider the interwoven web of espionage that permeated the Cold War. In a world focused technology and “wiki-leaks”, this book reinforces the necessity of human intelligence. I highly recommend it if you are interested in Cold War espionage.