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. About the Author Jude Watson is the author of the bestselling Star Wars: Last of the Jedi and Jedi Quest books, the most successful licensing series of all time.