The third book in the CAHILLS VS. VESPERS series, the follow up to the worldwide bestseller THE 39 CLUES. The Vespers have crossed a line. Amy and Dan were devastated when the Vespers kidnapped seven Cahills around the world, holding them hostage until Amy and Dan delivered an impossible ransom. But at least the hostages were Cahills - members of the world's most powerful family, trained to face a
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