John Buchan, 1st Baron Tweedsmuir, GCMG, GCVO, CH, PC (1875-1940), was a British novelist, best known for his novel The Thirty-nine Steps, and Unionist politician who served as Governor General of Canada. He is also noted for his horror fiction, including the novel Witch Wood, and the stories Skule Skerry, The Wind in the Portico and The Green Wildebeest.