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William Wenton is a code-breaking genius, but now he faces a new threat - one that's lurking inside him - in the second book in the William Wenton series that School Library Journal calls "part Alex Rider, part Da Vinci Code for kids, and part Artemis Fowl."After William begins to suffer from mysterious fits that leave him unable to control his body - let alone crack codes - he begins to worry that the metal inside him is acting up. There's only one place he can go for answers: the Institute for Post-Human Research. But nothing at the Institute is the same. His room is more like a cell, and outside the window, huge searchlights sweep the skies and robot vehicles roam the grounds. William's old teachers won't tell him what's going on although it's obvious that everyone is frightened of something - or someone.