Shaken by a shocking loss, Amy and Dan flee to an exotic land and trace the footsteps of their most formidable ancestor yet: a military leader of mythic proportions. But just as the siblings begin to master the art of ancient warfare, they confront a dangerous enemy - the truth. With the stakes higher than ever, Amy and Dan uncover a devastating secret about the Cahill family that changes everything.

 

This book is part of a book series called 39 Clues .

There are 192 pages in this book. This book was published 2015 by Scholastic US .

Peter Lerangis is the author of many books for young readers, including wtf , Smiler's Bones , the Watchers series, The Sword Thief , and the New York Times bestselling 39 Clues series. Peter lives with his wife and two sons in New York City. Visit him at PeterLerangis. com.