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? If you're Amy and Dan Cahill, you take the Clue - and begin a very dangerous race.

Twelve-year-old Theodore “Teddy” Roosevelt Fitzroy has murder on his hands and trouble on his tail. He believes that Henry, the hippopotamus at the brand-new FunJungle, has been murdered. The zoo’s top brass claim the hippo went belly up the natural way, but Teddy and his feisty friend...

Amy and Dan find themselves in a new global race but this time, everything’s different. Those closest to them might be working for the enemy, and Amy and Dan are forced to ask themselves how far they’re willing to go to save the kidnapped Cahills. How much can you risk when there’s no one to trust?

If Carter hadn't been checking his phone, he might have seen his brother coming down the ski slopes in his direction. And if Carter had seen his brother in time and avoided the crash, he might not have two broken legs right now. Oops.

The morning after Hurricane Leo rips through their town, Evan, Jason, Mitchell, and C.J. find a total mess outside, with downed branches and uprooted trees everywhere. They know they should stay indoors—but they want to go exploring, even if it means having a new kid, Ricky, tag along...