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

The 39 Clues Book 1: The Maze of Bones is by New York Times bestselling author Rick Riordan and is available now.

The 39 Clues Book 2: One False Note is by acclaimed author Gordon Korman and is available everywhere on December 2nd.

The 39 Clues Book 3: The Sword Thief is by kid favorite Peter Lerangis and hits stores on March 3, 2009.

And there are seven more books coming, ending with Book 10 in September 2010!

Collect the Cards

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

Each book comes with the same 6 cards.

39 Clues card packs are available separately. The first card pack comes with 16 cards randomly pulled from a pool of 55, as well as a game guide with tips on how to play.

Each card comes with a unique identification code. Enter this code on the website to create your own online card collection!

The next wave of cards will be available starting June 2009.

Play the Game

Join now to start your hunt for the 39 Clues. Create an account at the39clues.com, 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.