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TheEmperor'sCode Gordon Korman
After a horrible argument between Amy and Dan in Beijing, Dan finds himself being kidnapped. Dan is brought to Jonah Wizard, who says he is trying to find his sister, but will do any to keep them apart. Amy and their babysitter/au pair heads to the great wall in hope to find Dan, while Jonah takes Dan to the terracotta warriors. Dan finds out what Jonah is up to, and flees. Amy finds a secret room in the wall that leads to the next clue in Mt Everest, hoping he will go too. Dan looks on national television to see that some of the competition is already climbing. He hides in a train going all the way to the bottom of Mt Everest, while Amy flies. Incredibly they find each other, right at the only helicopter that can fly to the top. They fly to the top, grab the clue, and head to the Caribbean. Summary
Storm Warning Dan and Amy head to the Caribbean to find out the next clue about Anne Bonny, a madrigal like Amy and Dan. No one has ever known who madrigals are, until now, when they finally strike.