Gr 5-8 If there were a genre of ``yuppie fiction,'' this junior novel would surely qualify: Pete's mother cooks ratatouille, her mother shops at Bergdorf Goodman and Lily's father jogs in a T-shirt that says ``COP ON THE RUN.'' Despite the trendy veneer, however, serious concerns are treated. Pete (Patricia) lives with her young widowed mother in a New York City apartment building. Both mother and daughter are still grieving, but Pete finds solace in her friendship with Lily, who lives downstairs with her divorced father. Pete feels threatened, though, when Lily discovers boys. To make matters worse, Pete's mother and Lily's father are starting to date. Pete thus feels doubly abandoned, and she has to learn to share the ones she loves. Fortunately, Pete herself develops a friendship with a boy, and the story ends on a happy note. The book presents a convincing portrait of adolescent jealousy, as well as of the need to let go of the past and to adapt to life's changes. Young readers will enjoy Pete's breezy style of narration and the lively dialogue. A pleasant page-turner that touches on deeper topics. Cynthia Percak Infantino, Ela Area Public Library, Lake Zurich, Ill.