The 18th installment in the deliciously entertaining series, this time Leon sets her urbane Venetian policeman on the trail of none other than ... garbage -- or rather corruption, murder, toxic waste, trucking, toxic wade and the environment, all wrapped in leisurely ,meals with wife and children and lots of scenes of daily life. The titles refers to a great baeuty, ruined by a tragically misguided facelift, part of a second plot involving the father-in-law.  (ITA54, $14.00)