" This is a very atmospheric spy novel dealing with the prewar period (1937), the action shifting from Warsaw to Paris, S.France, Silesia & Germany. The central character is Mercier, a French aristocrat, veteran of WW1, and spymaster, working in Warsaw where he gets a German businessman to provide information on German tanks, and is exposed when he saves him from an attack. He later conducts spying operations in Germany, and ultimately subverts an insider in the SD(security branch of the SS)who will provide evidence to support what has already been published in German military journals-that the Germans are planning a blitzkrieg of tanks which will bypass the Maginot line, by going through the Ardennes forest in Belgium. Along the way he falls in love with a beautiful Polish lawyer employed by the League of Nations, whom he will ultimately marry. His success in penetrating the Nazi security apparatus is rewarded by a promotion & a job in Paris, but his information is disbelieved, and he will ultimately leave France with de Gaulle to continue the struggle from England, following the rapid German victory. "
— Charles, 1/16/2014