The heart-stopping 39 CLUES series returns with an even deadlier challenge, as a new enemy is revealed to be searching for The 39 Clues too... Amy and Dan's race to save the hostages reaches its thrilling conclusion. Who will be victorious? The Cahills or the Vespers?

 

This book features in the following series: 39 Clues-Unstoppable, Unstoppable .

There are 192 pages in this book. This book was published 2014 by Scholastic .

Gordon Korman published his first book at age fourteen and since then has written more than ninety middle grade and teen novels. Favorites include the New York Times bestselling Ungifted, Supergifted, The Unteachables, Pop, Schooled, and the Masterminds series. Gordon lives with his family on Long Island, New York. You can visit him online at www. gordonkorman. com.