In this fourth installment in the popular Inspector Montalbano series. Camilleri delivers a delightful cast of characters and wry commentary on Sicilian ways, headed by the irresistible Inspector Montalbano, a small town police detective with a healthy appetite, roving intellect and wry sense of humor. It opens with a classic conceit of police procedurals: a beautiful blond woman is found dead. That's the least of it.  (ITL537, $13.00)