The 39 Clues: Cahills vs. Vespers Card, Pack 1: The Marco Polo Heist

Are you ready to save the world?

The Cahills were the most powerful family history had ever known . . . until they met the Vespers. Now the fight is on and the world hangs in the balance. 16 explosive evidence cards unlock a globe-trotting online mission. Follow the ancient trail of explorer Marco Polo and the warlord Kublai Khan to stop a Vesper plot — and discover their darkest secrets.

Your Mission:

• Crack codes and solve leads
• Travel the world to interview suspects
• Find the golden passport
• Complete a daring heist
• STOP THE VESPERS!