A clue found in Book 3 sends Amy and Dan jetting off to find out 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?
General Note
"Exclusive bonus material, listen to a kidnapping attempt on young Grace Cahill"--Container.
"Listen to the audio, play the game, win the prizes"--Container.
Unabridged.