At the beginning of 1937, the British monarchy was in a state of turmoil. The previous king, Edward VIII, had abdicated the throne, leaving his unprepared and terrified brother Bertie to become George VI, surrounded by a gaggle of courtiers and politicians who barely thought him up to the job. Meanwhile, as the now-Duke of Windsor awaited the decree that would allow him to marry his mistress Wallis Simpson, he took an increased interest in the expansionist plans of Adolf Hitler. He may even have gone so far as to betray his country in the process. And as double agents and Nazi spies thronged the corridors of Buckingham Palace, the only man the King could trust was his Prime Minister, Winston Churchill. But they faced a formidable, even unbeatable, adversary: his own brother.

The Windsors at War tells the never-before-told story of World War Two in Britain and America with a fresh focus on the royal family, their conflicted relationships, and the events that rocked the international press. How did this squabbling, dysfunctional family manage to put their differences aside and unite to help win the greatest conflict of their lifetimes? Alexander Larman, author of The Crown in Crisis, now chronicles the Windsor family at war with Germany--and each other.