Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Well written view into the CIA and KGB

I thoroughly enjoyed reading this book. I had trouble putting it down, and it was looong! It was not a strong plot that pulled me through but rather a rich immersive background and atmosphere. I really enjoyed finding out about the 'back side' of events that I remember from the news when I was in high school.I would highly recommend this book to anyone with a flair for spy stories or cold war history.