The 39 Clues Book 4: Beyond the Grave (2009)

A Clue found in Book 3 sends Amy and Dan jetting off to find out just what's behind the fierce rivalry between the Tomas and Ekaterina branches of the Cahill family. Was a Clue stolen from the Tomas branch? Where is it now? And most important, can Amy and Dan get their hands on it before their rivals do? It's a wild race that will take Amy and Dan deep into the bowels of the earth . . . and right into the hands of the enemy.

Author: Jude Watson

Categories: Ages 9-12, History & Historical Fiction, Literature, People & Places, Children's Books