The 39 Clues is unstoppable! The bestselling series returns with an adventure spanning four explosive books and a website that places readers right in the action. The Cahill family has a secret. For five hundred years, they have guarded the 39 Clues -- thirty-nine ingredients in a serum that transforms whomever takes it into the most powerful person on earth. If the serum got into the wrong hands, the disaster would rock the world. So certain Cahills have always made it their mission to keep the serum safe, buried, locked away. Until now. Thirteen-year-old Dan Cahill and his older sister, Amy, are the latest guardians of the Clues. They think they've done everything right, but a tiny mistake leads to catastrophe. The serum is missing and Dan and Amy have to get it back and stop who stole it . . . before it's game over. For everyone. The 39 Clues remains . . .- 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 Jude Watson is the author of six 39 Clues books, Beyond the Grave, In Too Deep, Vespers Rising, A King's Ransom, Nowhere to Run, and Mission Titanic, along with the bestselling Star Wars: Last of the Jedi and Jedi Quest series. As Judy Blundell, she wrote What I Saw and How I Lied, the 2008 winner of The National Book Award for Young People's Literature. She lives in Long Island, New York, with her husband and daughter. The 39 Clues remains . . .- 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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