When William Came: A Story of London Under the Hohenzollerns is a novel written by the British author Saki (the pseudonym of Hector Hugh Munro) and published in November 1913. It is set several years in what was then the future, after a war between Germany and Great Britain in which the former won. The "William" of the book's title is Kaiser Wilhelm II of the House of Hohenzollern. The book chronicles life in London under German occupation and the changes that come with a foreign army's invasion and triumph.