Anna Goldsmith, 13, moves with her family from London to a northern town. Beautiful and an ace student, she is praised by her teachers, given a violin solo, and assigned to play center fielder in hockey, displacing Hayley Parkin, who is her first and seemingly devoted friend. What Anna doesn't know is that Hayley is an adept manipulator and all of her classmates live in fear of her. First she draws people in to learn their sensitivities and secrets, then launches whisper campaigns against them. Once she has totally isolated her victim via social ostracism, she launches physical attacks. When Melanie Blackwood, who really wants to be Anna's friend, gradually gives in to Hayley's pressure, Anna begins to cut herself. Upon discovering this activity, her well-intentioned but all-too-busy parents call on the teachers for help. A few superficial changes take place, and the adults work to set the "personality clash" to rights. But Hayley is just getting started. Although the vocabulary is simple, this book is complex in structure. The first chapter is told in present tense via an omniscient narrator as Anna sets in motion what will be the climax of the plot. The next chapter features Melanie reminiscing about how all of this started. Anna, who is comatose through most of the book, speaks mostly through her diary entries and letters. The shifting narratives contribute to a compelling story that will strike a chord with many young teens.