John Buchan, 1st Baron Tweedsmuir (1875 – 1940), was a Scottish Unionist writer and politician who served as Governor General of Canada and became famous for his novel "The Thirty-Nine Steps". "The Thirty-Nine Steps" was published by Buchan in 1915 and adapted for the screen by Alfred Hitchcock two decades later, achieving great success both among readers and on the cinema screens.