A classic spy story. I love the Russian character, Filitov. Tired of life, loving his country but recognizing it's wrong-headedness, he seeks to balance the scales by giving the enemy enough information that they will feel confident enough to pursue peace and not war. The book is just a joy to read, easy in pace, plenty of twists and turns, good rich characters, a very plausible story. I wanted this hard cover to add to my permanent library where it joins Red October and Patriot Games as 3 Clancy books worth keeping.