The grandfather of Queen Elizabeth II, King George V reigned over the British Empire from 1910 to 1936, a period of international turbulence. Today, he is best remembered for his disastrous quarrel with his eldest son, the Duke of Windsor, which culminated in the existential crisis of the Abdication. Often considered dull and uninspired, George nonetheless rose to the occasion to contend with the Great War, a constitutional crisis, and the rise of Bolshevism. As Jane Ridley shows, George reshaped the modern British monarchy, allowing it to survive and thrive.