Six nuns and a shotgun (Red mask mystery) Hardcover – January 1, 1975 by Colin Watson
 
Flaxborough has its share of fat-cat businessmen—‘wheels’ (in US gangster parlance)...
Like the brash Councillor Henry Crispin and snobbish Arnold Hatch, proprietor of the Floradora Country Club. Their bitter rivalry is well known, so when Crispin’s luxury river cruiser, the Lively Lady, is ruthlessly sunk, shortly after Hatch’s night-time shenanigans had been lit up for the world to see, no one expects the feud to die away peacefully.
But there is a death, a far from peaceful one, and DI Purbright and Sergeant Love have information that it might be linked with the arrival in town of a certain Sicilian-American gentleman.
 
5.24