39 Clues

Amy and Dan Cahill are hot on the trail of one of 39 Clues hidden around the world. When there's a Clue on the line, anything can happen.

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.

Amy and Dan make shocking discoveries about their family's power and their parents' deaths as they track the next clue to a remote corner of the world.

Amy and Dan must steal a Clue guarded by thousands of the world's best-trained soldiers. With their enemies closing in, the brother and sister are separated. Now how will they stand a chance?

Throughout the hunt for the 39 Clues, Amy and Dan have encountered some of the darkest aspects of history... and had to deal with the role their family played. But are they ready for the truth? In this thrilling ninth installment, Amy and Dan hit the high seas as they follow the trail of some infamous ancestors to track down a long lost treasure. However, the real prize isn't hidden in a chest. It's the discovery of the Madrigals' most dangerous secret and, even more shockingly, the true identity of the mysterious man in black.

Defend the Clues Fourteen-year-old Amy Cahill and her younger brother, Dan, thought they could return to theirregular lives when they found the 39 Clues that safeguard their family's great power. But theywere wrong. Powerful enemies – the Vespers – have been waiting in the shadows. And they'llstop at nothing to grab the Clues. Four powerhouse authors unite to expose the 500-year-oldsecret struggle between the Cahills and the Vespers. The Vespers are rising... and the worldis in jeopardy.