Last year's Caldecott prizewinner retells the story of Cinderella according to the operatic version of Rossini. Text and illustrations are based on the 1817 production of Cenerentola. The illustrator displays and poses the characters -- the stepsisters are unmistakably wicked in expression and the fairy godmother is a wizard, suitably magical. In the fractured line technique used in his previous books, Mr. Montresor has made each illustrated page a boxed stage with draperies for borders and obvious floorboards in each. The full colors employed are not as successful. Some of the illustrations are filled with a real stage glow of full footlights and overheads. Others, with hot pinks and bilious greens, come shrieking off the page like an off-key diva's loudest note.