Swag, published in 1976 by Delacorte Press, begins the modern version of Leonard's bibliography. Before now, he'd written westerns and a few crime novels (I've been reading them the last few years). Swag has the same dark story of criminals doing crime and the police trying to catch them, but adds in a ton more levity and fun to the criminal acts. It's a fast read at around 225-250 pages depending on the edition, but it may take longer as everyone around you will ask what you are laughing at.