The 39 Clues

The 39 Clues Double-Dealing Tour

39 Clues hidden around the world guard the source of the Cahill family's immense power and it's up to YOU to find them.

It's 'Cahill vs. Cahill in a worldwide race to find the Clues . . . and beat the competition.

A deadly enemy known only as the Vespers has emerged from the shadows. The Cahills must stop them or humankind will pay the price. Are you ready to save the world?

Seven members of the Cahill family have been kidnapped and the Vespers are demanding an impossible ransom. Dan Cahill and his sister Amy have just days to steal some of history's most famous works of art and hand them over to the Vespers. But the Vesper plot goes deeper than the Cahills know – they're after nothing short of world domination. Each The 39 Clues: Cahills vs. Vespers book comes with 6 game cards and unlocks and online mission.

The Cahills vs. Vespers cards provide the leads you need to stop the Vespers! Each card comes with a unique identification code. Enter the code on this website to create your own online card collection.

  • Each book comes with a set of 6 cards and unlocks a mission to unmask a Vesper.
  • Each Cahills vs Vespers Card Pack contains a single set of 16 cards and unlocks an extreme mission to track down a lost treasure.

Calling all Cahills! Join now to help Amy and Dan identify and stop the Vespers. Take off on worldwide missions, learn the skills of a master spy, and connect with other agents on the global Cahill Command Message Board. Are you ready to save the world?

For a list of photo credits, click on the link below:
Photo Credits