With your interest in early 20th century history I thought you might be interested in a book just published over here.

Warsaw 1920 : Lenin's Failed Conquest of Europe by Adam Zamyoski. It tells the story of the all but forgotten Polish-Soviet War of 1920 which he claims was the Soviet's first attempt to spread Communism throughout Europe. Apparently there were plans to invade Romania, Czechoslovakia and Hungary too and to destabilize Italy. Luckily the Russians were defeated.