The summer of 1992 had been exceptionally cold in southern Italy. But that’s not why it is remembered. That summer ushered in a spate of killings by the Mafia of judges and police officers, most of them assassinated near Palermo. The Sicilian killings and ensuing gang wars also infected the Bari region in Puglia, triggering an investigation by local Carabinieri officer Pietro Fenoglio, the hero of Carofiglio’s latest novel.