The 39 Clues Wiki
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The 39 Clues Wiki

Mallory Kass is an editor for several books in The 39 Clues, including Worlds Collide: Tales from an Awesome-Sauce Party, as well as the author of The Black Book of Buried Secrets. Under the pseudonym Clifford Riley, she has also written Rapid Fire 5: Turbulence and The Cahill Files: Operation Trinity.


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