William L. Shirer, The Rise and Fall of the Third Reich
Winston S. Churchill, The Gathering Storm
Stalin thinks he holds all the cards in his game with Hitler. Hitler is pre-occupied with France and Britain while Stalin is cleaning up in Eastern Europe. He wants to put the squeeze on Hitler for as much as he can.
Of course, I wonder how Stalin’s tune would change if France were to somehow drop out of the war quickly. After all, it should be pretty obvious to the entire world that the Winter War has exposed some serious weaknesses in the Red Army....