Olivia Sharp is a poor-little-rich-girl-type at loose ends in her San Francisco penthouse. Her parents are in Paris; her chauffeur and her owl are her most reliable companions. Olivia goes into business as an ``agent for secrets;'' her first job is to improve her classmate Duncan's social life. After various failures (most of which do involve pizza, but none of which involves a monster), she (and Duncan) succeed. This book is written as a television show, slick and glitzy, with staccato sentences that will be appropriate for children who are ready for more advanced easy readers. Olivia is a sophisticated child, and her lifestyle will evoke both pity and envy from her readers. (``I waited for Duncan to call back. I read my horoscope. I arranged my credit cards in alphabetical order. I smoothed Hoot's feathers.'') Humorous black-and-white drawings break up the text. Like the story itself, they are somewhat lacking in substance and emotion. An additional title for collections needing popular, accessible ``fluff'' for younger children. --Lauralyn Persson, Wilmette Public Library, IL Copyright 1989 Cahners Business Information, Inc.