<DIV>Bestselling author Jude Watson takes Amy and Dan on a thrill-packed ride for the 4th installment of the 39 Clues.<br><br>JOIN ANYTIME TO PLAY FOR THE CHANCE TO WIN!<br><br>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?<br><br>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.</div>