C. Daly King (1895-1963) was an American psychologist and detective story writer. He was born in New York City and educated at Yale University. After fighting in World War I, he worked in textiles and in advertising before returning to school to study psychology, with a particular focus on sleep and consciousness. In the 1930s, King published nine books that quickly established him as a master of the Golden Age mystery, but ceased writing fiction with the advent of World War II.

Vincent Starrett (1886-1974) was a Chicago journalist who became one of the world's foremost experts on Sherlock Holmes. A books columnist for the Chicago Tribune, he also wrote biographies of authors such as Robert Louis Stevenson and Ambrose Bierce, various books on books and book collecting, plus Sherlockian pastiches and numerous short stories and novels. A founding member of the Baker Street Irregulars, he is perhaps known best today for The Private Life of Sherlock Holmes, an imaginative biography of the great detective.

Cornell Woolrich (1903-68) was one of the most admired and influential of all 20th century American crime writers. His work inspired many films, including most famously The Leopard Man, Phantom Lady, Rear Window, The Bride Wore Black, Mississippi Mermaid and Union City. He led a strange and often very unhappy life, latterly as a recluse in a Manhattan hotel.