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...

Amy and Dan cross the oceans on the trail of a famous aviator, but they find more than they're looking for. Their enemies are becoming more vicious, and the truths they discover more crushing than ever.

Nineteen-year-old returning champion Sean Kendrick competes against Puck Connolly, the first girl ever to ride in the annual Scorpio Races, both trying to keep hold of their dangerous water horses long enough to make it to the finish line.

After his grandfather dies, Andrew Hope inherits a house and surrounding land in an English village, but things become very complicated when young orphan Aidan shows up and suddenly a host of variously magical townsfolk and interlopers start intruding on their lives.

Maeve Merritt, chafing against the rigid rules of her London boarding school, finds her life transformed by the genie she happens upon--and by those who want to steal him.

In 1890 Washington the only family Joseph Johnson has left is his half-wild Indian pony, Sarah, so when she is sold by a man who has no right to do so, he sets out to get her back--and he plans to let nothing stop him in his quest.

Six children help solve the mystery of a missing spyglass that has kept two brothers feuding for years.

Newly-named wizard Alexander Taylor joins a familiar company of adventurers on a new quest to discover the fate of the legendary dwarf Albrek, find his mythical tomb, and locate the lost talisman that could be the key needed to save the entire dwarf realm.

An abridged version of the tale of Sara Crewe, a pupil at Miss Minchin's London school, who is left in poverty when her father dies but is later rescued by a mysterious benefactor.

As the race to find the 39 Clues builds to its explosive finish, Amy and Dan must explore an ancient culture and steal a Clue guarded by thousands of the world's best-trained soldiers. It's the most dangerous Clue search yet--and it may mean the end for Amy and Dan.