From the back cover:

In late September 1941 the war in the east was approaching a climax. Since the beginning of the German invasion on 22 June 1941, Soviet forces had suffered the staggering loss of over 2 million troops. Operation Typhoon began and in the first week of the offensive, the three German panzer armies surrounded virtually the bulk of the Soviet forces barring the way to Moscow. This title details the dramatic battle that took place right up to the suburbs of Moscow itself, and the defeat which altered Hitler's strategic management of the war.