Book 1

The Maze of Bones

by Rick Riordan

Published 1 September 2008
What would happen if you discovered that your family was one of the most powerful in human history? What if you were told that the source of the family's power was hidden around the world in the form of 39 clues? What if you were given a choice - take a million dollars and walk away ...or get the first clue and begin the search? At the reading of their grandmother's will, Dan and Amy are given this choice - and they take the clue. Immediately, they are caught in a dangerous race against their own family members. The hunt is on...Think you've gone everywhere books can take you? Think again. Books are going to a new place, but you have to follow the clues to get there. Join Amy and Dan as they begin the hunt for the 39 Clues in Book One: The Maze of Bones. The high-octane adventures will continue for a total of ten exhilarating books written by well-known authors over two years. The 39 Clues also encompasses hundreds of game cards and an online world that that allows you to play a part in the story and compete for 100s of prizes, totalling over 50,000 pounds.

Book 2

One False Note

by Gordon Korman

Published 2 December 2008
Super-selling author Gordon Korman sends Amy and Dan off on a wild chase in Book 2 of the highly-anticipated 39 Clues series. THIS JUST IN! Amy and Dan Cahill were spotted on a train, hot on the trail of one of 39 Clues hidden around the world. BUT WAIT! Police report a break-in at an elite hotel, and the suspects ALSO sound suspiciously like Amy and Dan. UPDATE! Amy and Dan have been seen in a car ...no, in a speedboat chase ...and HOLD EVERYTHING! They're being chased by an angry mob?!? When there's a Clue on the line, anything can happen.Think you've gone everywhere books can take you? Think again. Books are going to a new place, but you have to follow the clues to get there. Join Amy and Dan as they continue the hunt for the 39 Clues in Book Two: One False Note. The high-octane adventures will continue for a total of ten exhilarating books written by well-known authors over two years. The 39 Clues also encompasses hundreds of game cards and an online world that that allows you to play a part in the story and compete for 100s of prizes, totalling over U50,000.

Book 3

The Sword Thief

by Peter Lerangis

Published 3 March 2009
ATTENTION! Amy and Dan Cahill have been located once again, this time in the company of the notoriously unreliable Alistair Oh. Could they have been foolish enough to make an alliance? Spies report that Amy and Dan seem to be tracking the life of one of the most powerful fighters the world has ever known. If this fearsome warrior was a Cahill, his secrets are sure to be well-guarded...and the price to uncover them just might be lethal.Think you've gone everywhere books can take you? Think again. Books are going to a new place, but you have to follow the clues to get there. Join Amy and Dan as they continue the hunt for the 39 Clues in Book Three: The Sword Thief. The high-octane adventures will continue for a total of ten exhilarating books written by well-known authors over two years. The 39 Clues also encompasses hundreds of game cards and an online world that that allows you to play a part in the story and compete for 100s of prizes, totalling over U50,000.

Book 4

Beyond the Grave

by Jude Watson

Published 15 May 2009
Amy and Dan are hot on the trail of the fourth Clue, but their ruthless relatives will stop at nothing to eliminate them from the competition. Their hunt leads them to an ancient city that has been a hot bed of Cahill activity for centuries. All that stands between the siblings and the Clue is a cryptic riddle, a missing relic, and the secret of their grandmother's past. The clock is ticking for Amy and Dan, but can they really solve a mystery that has eluded their ancestors for generations?

Book 6

In Too Deep

by Jude Watson

Published 3 November 2009
Seven years ago there was a terrible fire. Dan and Amy Cahill were saved, but both of their parents died. The fire was ruled accidental, and Dan and Amy had no reason to believe otherwise ...until now. What really happened that awful night? Was the fire a tragedy ...or was it murder? Amy and Dan are about to learn some crushing truths and get help from an unexpected ally.

Book 7

The Viper's Nest

by Peter Lerangis

Published 1 February 2010
Shaken by a shocking loss, Amy and Dan flee to an exotic land and trace the footsteps of their most formidable ancestor yet: a military leader of mythic proportions. But just as the siblings begin to master the art of ancient warfare, they confront a dangerous enemy \- the truth. With the stakes higher than ever, Amy and Dan uncover a devastating secret about the Cahill family that changes everything.

Book 8

The Emperor's Code

by Gordon Korman

Published 6 April 2010
The "New York Times" bestselling series. As the race to find the 39 Clues builds to its explosive finish, Amy and Dan must steal a Clue guarded by thousands of the world's best soldiers. With their enemies closing in, the siblings are separated. Together, they almost have a chance, but alone ...Could the search for this Clue spell the end of Amy and Dan?

Book 11

The Cahills aren't the only family searching for the Clues. . . . The Cahills thought they were the most powerful family the world had ever known. They thought they were the only ones who knew about Gideon Cahill and his Clues. The Cahills were wrong. Powerful enemies-the Vespers-have been waiting in the shadows. Now it's their time to rise and the world will never be the same. In Vespers Rising, a brand-new 39 Clues novel, best-selling authors Rick Riordan, Peter Lerangis, Gordon Korman and Jude Watson take on the hidden history of the Cahills and the Vespers, and the last, terrible legacy Grace Cahill leaves for Amy and Dan. It was always leading to this.

Black Book of Buried Secrets

by Rick Riordan

Published 26 October 2010
The ultimate guide to the New York Times bestselling series, with an introduction by Rick Riordan! This book is the ultimate source of all Cahill knowledge. It contains every buried secret, Cahill weapon or gadget, all the strongholds, and each agent and founder. In it, you will discover the true story of Madeleine Cahill as well as what happened after Isabel Kabra was charged with murder. Nothing has been held back. Seven Cahill agents came together to bring you this book, betraying their branches and their most deeply held beliefs. They did it because there is an enemy approaching far more powerful than the Cahills. Keep this black book close at all times, and be ready.

39 Clues: #1 Card Pack

by Rick Riordan

Published 1 October 2008