Betrayal — Giorgio Scerbanenco

From the godfather of Italian noir
"A noir writer richly deserving rediscovery." 
"--Publishers Weekly "
One balmy spring evening on the outskirts of Milan, a Fiat with two passengers plunges into a canal. At first, their deaths are registered as an accident.
But Duca Lamberti, the doctor-turned-detective of Giorgio Scerbanenco's legendary series, suspects there's more to it than that. Because that same canal has been the scene of other deaths, and all the incidents have one man in common: a lawyer with a murky past stretching all the way back to World War II--a man who, in fact, once shared a prison cell with Lamberti.
Winner of the most prestigious European crime prize on its original publication in 1966, "Traitors to All" is classic noir by one of the greatest writers of the genre--a book that lays bare the connections between Milan's troubled history during the war and its swinging sixties affluence, as well as an utterly absorbing tale of betrayal and revenge.