Furst (The Foreign Correspondent
) solidifies his status as a master of historical spy fiction with this compelling thriller set in 1937 Poland. Col. Jean-François Mercier, a military attaché at the French embassy in Warsaw who runs a network of spies, plays a deadly game of cat-and-mouse with his German adversaries. When one of Mercier’s main agents, Edvard Uhl, an engineer at a large Düsseldorf arms manufacturer who’s been a valuable source on the Nazis’ new weapons, becomes concerned that the Gestapo is on to him, Mercier initially dismisses Uhl’s fears. Mercier soon realizes that the risk to his spy is genuine, and he’s forced to scramble to save Uhl’s life. The colonel himself later takes to the field when he hears reports that the German army is conducting maneuvers in forested terrain. Even readers familiar with the Germans’ attack through the Ardennes in 1940 will find the plot suspenseful. As ever, Furst excels at creating plausible characters and in conveying the mostly tedious routines of real espionage. Author tour. (June)