Minutes before she died Grace Cahill changed her will, leaving her descendants an impossible decision: "You have a choice - one million dollars or a clue." Grace is the last matriarch of the Cahills, the world's most powerful family. Everyone from Napoleon to Houdini is related to the Cahills, yet the source of the family power is lost. 39 Clues hidden around the world will reveal the family's secret, but no one has been able to assemble them. Now the clues race is on, and young Amy and Dan must decide what's important: hunting clues or uncovering what REALLY happened to their parents. The 39 Clues is Scholastic's groundbreaking new series, spanning 10 adrenaline-charged books, 355 trading cards, and an online game where readers play a part in the story and compete for over $100,000 in prizes. The 39 Clues books set the story, and the cards, website and game allow kids to participate in it. Kids visit the website - www.the39clues.com - and discover they are lost members of the Cahill family.Experience the complete adventure with Dan and Amy Cahill in this fantastic 10 book series collection - including the finale 39 Clues Book 10: Into the Gauntlet!

A brand new adventure from the world of The 39 Clues!For 500 years, the Cahills have been the most powerful family in the world. For 500 years, they've protected the source of their power - the 39 Clues. And for 500 years, they've kept their secrets silent. Until now.This extraordinary stand-alone novel cracks open the Cahill vault to tell the story of the most coveted piece of artwork in the world, a masterpiece that has been the target of seven separate theft attempts: Jan van Eyck’s altarpiece at Ghent. OPERATION TRINITY chronicles the first Vesper attack on the altarpiece in the 1600s, then jumps to WWII and young Grace Cahill’s desperate bid to save the masterwork from the Nazis. The final piece of the novel tells the story of Ian and Natalie Kabra’s first solo operation and features an 11th hour appearance by Grace Cahill on her final mission.History will never be the same.

39 clues to unscramble. One fabulous prize to win. It's a riddle, a book and a game to play. Are YOU up to the challenge? Written by celebrated author Rick Riordan, this interactive challenge takes books to a place they've never been before.

CALLING ALL CAHILLS! Announcing a 39 Clues Superspecial adventure -- the gang is back, and called to investigate one of their own: Sinead Starling. A TRAITOR RETURNSThe Cahills are the most powerful family history has ever known. For the past five centuries, they have secretly served as guardians of the world. The Cahills command presidents, take down corrupt governments... and are currently led by a fourteen-year-old boy with a superhero complex.Dan Cahill may be young, but he's nobody's fool. So he knows he must act fast when he learns that Sinead Starling, a former friend who betrayed the family, is up to her eyeballs in a plot to control a deadly virus. But is Sinead behind the plot, or is she a hero trying to stop the virus from getting out? The search for Sinead will take Dan and his friends from Cuba to the Bermuda Triangle, where the fate of the world may just depend on whether the Cahills can trust a traitor...

Three bestselling novels in one powerpack! Includes Rick Riordan's THE 39 CLUES: THE MAZE OF BONES, James Dashner's INFINITY RING: A MUTINY IN TIME, and Brandon Mull's SPIRIT ANIMALS: WILD BORN! Available together for the first time, three novels that each launched a blockbuster series. This powerpack includes:THE 39 CLUES #1: THE MAZE OF BONES by bestselling author Rick Riordan. Are you ready to save the world?INFINITY RING #1: A MUTINY IN TIME by bestselling author James Dasher. Fix the past. Save the future.SPIRIT ANIMALS #1: WILD BORN by bestselling author Brandon Mull. The legend lives in you.Three unforgettable adventures are waiting for you....

The heart-stopping 39 CLUES series returns with an even deadlier challenge, as a new enemy is revealed to be searching for The 39 Clues too... Amy and Dan's race to save the hostages reaches its thrilling conclusion. Who will be victorious? The Cahills or the Vespers?

An action-packed holiday adventure from the world of The 39 Clues! The Cahills are the most powerful family the world has ever known. Its members, which include everyone from Benjamin Franklin to Marie Curie, have shaped history through their global hunt for the 39 Clues—the key to the clan’s immense power. So when the family’s rival factions gather for a holiday celebration, everyone is on high alert. Everyone, that is, except for fourteen-year-old Amy and her eleven-year-old brother, Dan. The siblings are the only Cahills who don’t know about their legacy . . . and how far their relatives will go to keep them in the dark. Amy and Dan expect to spend Christmas Eve like they always do—trying not to embarrass themselves in front of the world leaders and celebrities who attend their grandmother’s annual party. But when an intruder steals an heirloom that once belonged to Paul Revere, Amy and Dan must call on skills they didn’t realize they had to stop the enemy. . . and uncover dangerous secrets about their mysterious family. Holiday bonus! Story includes an excerpt from The 39 Clues: THE MAZE OF BONES by Rick Riordan!