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222 pp.
| Scholastic |
August, 2011 |
TradeISBN 978-0-545-29839-1$12.99
(3)
4-639 Clues: Cahills vs. Vespers series.
Vesper One, a centuries-old adversary, kidnaps seven members of the powerful Cahill family. Thirteen-year-old Dan and sixteen-year-old Amy, winners of the clue hunt from the first 39 Clues series, must steal a national treasure and deliver it to the Vespers in exchange for the hostages. The fast-paced, action-packed adventure gets this spin-off series started with a bang.