A stroke of the pen and history is changed. In 1938, British prime minister Neville Chamberlain, determined to avoid war, signed the Munich Accord, ceding part of Czechoslovakia to Hitler. But the following spring, Hitler snatched the rest of that country, and England, after a fatal act of appeasement, was fighting a war for which it was not prepared. Now, in this thrilling alternate history, another scenario is played out: What if Chamberlain had...