Tensions run high in the explosive eighth book of The 39 Clues series. One belief has sustained fourteen-year-old Amy Cahill and her younger brother Dan on their hunt for the 39: they are the good guys. But then a shocking discovery about their parents shatters everything Amy and Dan think they know, dividing the two siblings for the first time ever. When Dan disappears in a country of more than a billion people, Amy has to make a terrible choice — find the next Clue... or find her younger brother.
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