Micah declares herself a liar and calls her own reliability as a narrator into question on the first page of this dark, gripping page-turner. When Zach, the boy with whom she might or might not be romantically involved, goes missing, Micah tries to tell the story of her tortured relationships with Zach and her classmates, teachers and family. Is Micah a killer? Quite possibly yes, but she weaves lies and truths together so artfully that even as she admits her deceptions, she becomes an increasingly compelling and sympathetic character. Micah’s fractured first-person narrative skips around chronologically, further deepening the confusion about what has really happened in her life. The constant reversals keep readers guessing, a plot device that threatens to wear thin by the halfway point of the novel, but Larbalestier moves the plot nimbly past this moment, creating such an engrossing story of teenage life on the margins that even readers familiar with her Magic or Madness trilogy might not see the supernatural twist (or not) coming. In the end, it calls to mind I Am the Cheese with its hermetic wiliness. (Fiction. 14 & up)