Day of Doom

The Ultimate SacrificeIt started with a kidnapping. A shadowy organization known only as the Vespers snatched seven members of the Cahill family and demanded a series of bizarre...

Mission Titanic

At only seventeen years old, Ian Kabra is head of the Cahills, the most powerful family in the world. He has presidents on speed dial, and generals at his beck and call. Ian knows...

Breakaway

The 39 Clues is unstoppable! The bestselling series returns with an adventure spanning four explosive books and a website that places readers right in the action.

Operation Trinity

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...

The Black Circle

Governments were toppled and rulers were killed during the last attempt to find the lost treasure Amy and Dan Cahill are searching for—do they even stand a chance?

The Maze of Bones

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...

Mission Atomic

Thirteen-year-old Dan Cahill and his older sister, Amy, are running out of time. An exiled Cahill known as the Outcast has already re-created three of history’s worst disasters,...

Shatterproof

After pulling some spectacular heists, Amy and Dan have become two of Interpol's most wanted criminals. So when Vesper One orders them to steal the world's largest diamond, they...

Zen Ghosts

It's Halloween.The trees are ablaze in fiery reds. Excited children don colorful costumes. And there's mystery and fun around every corner!When Addy, Michael, and Karl finish...

Into the Gauntlet

Throughout the hunt for the 39 Clues, Amy and Dan Cahill have uncovered history's greatest mysteries and their family's deadliest secrets. But are they ready to face the truth...

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