Two women are kidnapped in Florence's Piazza San Felice in this third Guarnaccia mystery. Guarnaccia's investigation takes him around Florence (the setting for the series) and up into the Tucsan foothills on the trail of suspected Sardinian kidnappers. The Columbo of Italy, Nabb's likeable Guarnaccia is not entirely at ease, a Sicilian living in Florence, but he's deceptively clever (and a solid citizen).  (ITL635, $12.00)