Commander George Gideon of Scotland Yard is a fictional policeman who appeared in 26 police procedural novels, 21 of which were written by John Creasey under the pseudonym J.J. Marric, and published between 1955 and 1976. Portraying Gideon as a master balancing the management of cases and the workings of law enforcement, it has been considered his "most famous police procedural series". After Creasey's death, the series was continued in five further novels by William Vivian Butler.