How do you steal a library? Not just any library but the most secret, heavily guarded archive in the world. The answer is to be a librarian. The work goes on for decades but remains so low key, that even after your escape, no one even notices you are gone.

The Spy in the Archive tells the remarkable story of how Vasili Mitrokhin—an introverted archivist—ended up changing the world. As the in-house archivist for the KGB, the secrets he was exposed to turned him into a dissident and then a spy; a traitor to his country but a man determined to expose the truth about the dark forces that had subverted Russia, forces still at work in the country today.

Historian and journalist Gordon Corera tells of the operation to extract this prized asset from Russia for the first time. It is an edge-of-the-seat thriller with vivid flashbacks. It is the story of what it was like to live in the Soviet Union, to raise a family there, and then of one man's journey from the heart of the Soviet state to disillusion, betrayal, and defection.

At its heart is Mitrokhin's determination to take on the most powerful institution in the world by revealing its darkest secrets. This is narrative nonfiction at its best.