The thrilling conclusion to 39 Clues Part VI: Doublecross. A Cahill family member from the past is bent on revenge! CHECKMATEThirteen-year-old Dan Cahill and his older sister, Amy, are running out of time. An exiled Cahill known as the Outcast has already re-created three of history's worst disasters, and he's saved the worst for last. If Dan and Amy can't find and stop the Outcast fast, he will initiate a full-scale nuclear meltdown.But as Dan and Amy race around the world, they discover something horrifying. The Outcast's disasters are only a smoke screen to cover up his true plan, a diabolical revenge on the family that betrayed him. Soon Amy andDan will have to confront a hard truth: Sometimes the only way to save the world is to sacrifice everything you love. The 39 Clues is:-A New York Times Bestselling Children's Book Series-A USA Today Bestseller-A Wall Street Journal Bestseller-A Publishers Weekly Bestseller-An Indie Bound Bestseller Sarwat Chadda is the author of the YA novels DEVIL'S KISS and DARK GODDESS. A former engineer, he is very glad to now be constructing stories and not ductwork systems. He lives in London, England, with his family. Visit him on the web at www.sarwatchadda.com and @sarwatchadda. The 39 Clues is:-A New York Times Bestselling Children's Book Series-A USA Today Bestseller-A Wall Street Journal Bestseller-A Publishers Weekly Bestseller-An Indie Bound Bestseller

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