Summer was supposed to be quiet at Camp Half-Blood. Instead, something in the woods is building killer robots. When bronze machines begin stalking the forest and watching the camp from within, Percy Jackson and his friends are sent on a quest to stop whoever—or whatever—is behind it. The problem? They’re not the only ones chosen. Luke, Thalia, Clarisse, and a demigod named Y/N are sent on the same mission, bound by the same prophecy…