Nik Cornish is a former head teacher whose passionate interest in the world wars on the Eastern Front and in Russia's military history in particular has led to a series of important books on the subject including Images of Kursk, Stalingrad: Victory on the Volga, Berlin: Victory in Europe, Partisan Warfare on the Eastern Front 1941-1944, The Russian Revolution: World War to Civil War 1917-1921, Hitler versus Stalin: The Eastern Front 1941-1942 - Barbarossa to Moscow and Hitler versus Stalin: The Eastern Front 1942-1943 - Stalingrad to Kharkov.