Twelve-year-old Mack MacAvoy suffers from a severe case of mediumness. . . . And then, one day, a three-thousand-year-old man named Grimluk appears in the boys' bathroom to deliver some startling news: Mack is one of the Magnificent Twelve, whatever that is. An evil force is on its way, and Mack must track down eleven other twelve-year-olds in order to stop it. But Mack doesn't want to be a hero. Will he answer the call?
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