Never turn your back on the Cahills . . . The most powerful family history has ever known returns with a vengeance in The 39 Clues: Doublecross!
The Outcast recreates the conditions for the "Titanic" disaster and gives Dan and Amy Cahill just days to stop the shipwreck from taking place. Book #1
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Featured Series
2 primary booksThe 39 Clues: Doublecross is a 2-book series with 2 primary works first released in 2015 with contributions by Jude Watson and Jenny Goebel.
