Auguste Le Breton (born Auguste Monfort 18 February 1913 – 31 May 1999) was a French novelist who wrote primarily about the criminal underworld. His novels were adapted into several notable films of the 1950s, such as Rififi, Razzia sur la chnouf, Le rouge est mis and Le clan des siciliens. He wrote the dialogue for the noir film Bob le flambeur.
Source : Wikipedia
