About The 39 Clues

The Cahills are the most powerful family the world has ever known. 39 Clues hidden around the world guard the family's power, and it's up to YOU to find them. It's Cahill versus Cahill in a worldwide race to find the Clues . . . and beat the competition.

To find the 39 Clues:

Read the Books – Each 39 Clues book unlocks one Clue.

Collect the Cards – Game cards help reveal Clues.

Play the Game – Find Clues through online missions.

Win the Prizes – Play and you could be eligible to win prizes!

Read the Books

read the books

Collect the Cards

The cards provide the leads you need to track down the 39 Clues.

collect the cards

Play the Game

Join now to start your hunt for the 39 Clues. Create an account, discover which branch of the Cahill family YOU belong to, and start exploring the website to see if you can be the first to find the Clues.

Join Now

Win the Prizes

Enter Contests. Win Sweepstakes. The Clues are out there. The hunt is on.

Click on your country to see what you might win!



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

Photo Credits