The 39 Clues Series

A family inheritance triggers a global treasure hunt between orphaned siblings Amy and Dan Cahill and their scheming relatives. With cryptic clues and a mysterious fortune at stake, readers can use included game cards to join the adventure online.

Two siblings lead the search for 39 clues that hold immense power. With a piece of Mozart's sheet music in their possession, they race to Vienna, but are pursued by power-hungry relatives. Will they discover the next clue or fall into a deadly trap? Find out in this thrilling book.

A thrilling adventure follows siblings Amy and Dan as they track the life of a legendary fighter, rumored to be a Cahill. With the unreliable Alistair Oh by their side, the siblings must navigate dangerous territory to uncover secrets that may prove lethal. Will they make it out alive? Find out in this heart-pounding novel.

This thrilling adventure follows siblings Amy and Dan on a hunt for 39 Clues that lead to extraordinary power. Betrayed and abandoned, they receive an unexpected message from their deceased grandmother, Grace. But is her help genuine or just another betrayal? Join them as they uncover family secrets in a race against time.

Discover the thrilling adventure of fourteen-year-old Amy Cahill and her younger brother Dan who are lured deep into Russia by a mysterious telegram. They embark on a treasure hunt to uncover the truth behind the murder of the last Russian royal family and a treasure stolen by the Nazis. But as they stray closer to the truth, danger looms and the treasure hunt becomes a game of cat and mouse. Join Amy and Dan as they risk everything to uncover the shocking secrets of their past.

Discover the buried secrets of a family's past in this thrilling adventure novel. Amy and Dan must navigate dangerous enemies and confront painful memories as they follow their parents' trail. But when they uncover secrets their grandmother never wanted them to know, they must decide how far they're willing to go to protect each other and their family's name.

In this thrilling installment of a popular New York Times bestselling series, siblings Amy and Dan's quest for power becomes even more dangerous as they uncover a shocking family secret. On an island with a man who knows too much, and amidst danger from the Indonesian police and a deadly storm, they must face one more terrifying truth about their past. Get ready for a heart-pounding adventure in The Viper's Nest.

This thrilling adventure book follows siblings Amy and Dan as they race to find the 39 Clues, exploring ancient cultures and outsmarting the world's best-trained soldiers along the way. The stakes are higher than ever before as they find themselves separated and faced with a difficult decision: find the next Clue or find each other. Get ready for an explosive finish to this heart-pumping series.

Embark on a thrilling high-seas adventure with Amy and Dan in this latest installment of the 39 Clues series. Discover a long lost treasure and uncover the Madrigals' most dangerous secret, including the true identity of the mysterious man in black. Are you ready for the truth?