Soldier, spy, politician, bestselling thriller writer, and governor general of Canada -- John Buchan was a man of many seasons and talents.

An accomplished Scottish journalist, soldier, head of intelligence, and Member of Parliament, John Buchan (1875-1940) is best known for penning thrillers such as The Thirty-Nine Steps. However, as Canada's 15th governor general (1935-40), Buchan, 1st Baron Tweedsmuir, played a significant leadership role as a statesman and diplomat.

Buchan was the first governor general appointed after the 1931 Statute of Westminster, which...