"Your situation is always ambiguous, isn't it, Guido?", his father-in-law, Count Orazio Falier, observes of Donna Leon's soulful detective, Guido Brunetti, at the beginning of her superb 28th Brunetti novel, Unto Us A Son Is Given. "The world we live in makes that necessary," Brunetti presciently replies. Count Falier was urging his Venetian son-in-law to investigate, and preferably intervene in, the seemingly innocent plan of the Count's best...