Mystery Mile is a crime novel by Margery Allingham, first published in 1930, in the United Kingdom by Jarrolds Publishing, London, and in the United States by Doubleday, Doran, New York. Following his first, supporting appearance in The Crime at Black Dudley (1929), it is the first of many novels starring the mysterious Albert Campion, and introduces his butler/valet/bodyguard Magersfontein Lugg.