"John Buchan's career as a writer, one of the best-selling of his day, would have been remarkable, even in someone who had done nothing else. He wrote more than a hundred books, including twenty-seven novels, six substantial biographies, a monumental twenty-four-volume contemporary account of the First World War, three works of political philosophy and a legal textbook. There were also dozens of poems and short stories, and about a thousand articles for newspapers and periodicals. As well as a writer, he was a scholar and an antiquarian and, at various times, a barrister, colonial administrator, journal editor, publisher, director of wartime propaganda, Member of Parliament, and imperial proconsul. He had been a skilled and intrepid mountaineer in his youth and was always a dedicated fisherman and a prodigious walker. And he did all this while suffering from debilitating illness for most of his adult life."
Ursula Buchan, Beyond the Thirty-Nine Steps: A Life of John Buchan.