The old world of spying-dead-letter boxes, microfilm cameras, an enemy reporting to the Moscow Center, and a hint of sexual blackmail-is history. The spymaster's technique has changed and the enemy has, too. He or she now frequently comes from a culture far removed from Western understanding and is part of a less well-organized group. The new enemy is constantly evolving and prepared to kill the innocent. In the face of this new threat, the spymasters...