Brand-new game cards reveal the most dramatic Cahill secrets yet!
The hunt for the 39 Clues approaches its explosive finale.
Card Pack 4 contains all the information you need to find the reamining Clues and solve the mystery of the Cahills' power. What secrets have the elusive Madrigals been hiding for centuries?
What really happend to Amy and Dan's parents?!
The shocking answers and more can be found inside The 39 Clues Card Pack 4: End Game.
Ages: 9-12
