The Medusa Plot (39 Clues: Cahills vs. Vespers, #1)

Are you ready to save the world? The bestselling series returns with an adventure spanning 6 explosive books, 2 secret-filled card packs, and a website that places readers right in the action. Thirtee…

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Vespers Rising

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Into the Gauntlet (The 39 Clues, #10)

The explosive finale to the #1 bestselling series!
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Storm Warning

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The Viper's Nest (The 39 Clues, #7)

The most dangerous secret in Amy and Dan's past is unveiled in Book 7 of the #1 New York Times bestselling series.

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In Too Deep (The 39 Clues, #6)

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The Black Circle (The 39 Clues, #5)

A game of cat and mouse...
A strange telegram lures fourteen-year-old Amy Cahill and her younger brother, Dan, deep into Russia and away from the only trustworthy adult they know. Signed with the initi…
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Nowhere to Run (The 39 Clues: Unstoppable, #1)

The Cahill family has a secret. For five hundred years, they have guarded the 39 Clues – thirty-nine ingredients in a serum that transforms whomever takes it into the most powerful person on earth. If…
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Betrayed by their cousins, abandoned by their uncle, and with only the slimmest hint to guide them, fourteen-year old Amy Cahill and her younger brother, Dan, rush off to Egypt on the hunt for 39 Clue…
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Amy and Dan Cahill have been located once again, this time in the company of the notoriously unreliable Alistair Oh. Could they have been foolish enough to make an alliance?

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Breakaway (The 39 Clues: Unstoppable, #2)

As a member of the most powerful family history has ever known, thirteen-year-old Dan Cahill has been shot at, kidnapped, and even thrown into a pit with a deadly snake. He's survived it all due to lu…
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Countdown (The 39 Clues: Unstoppable, #3)

The clock has finally run out for the Cahills. As the leaders of the world’s most powerful family, Dan and Amy have been in the crosshairs for too long. It was only a matter of time until luck failed …
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Mission Titanic

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The Maze of Bones (The 39 Clues, #1)

When their beloved aunt--matriarch of the world's most powerful family--dies, orphaned siblings Amy and Dan Cahill compete with less honorable Cahill descendants in a race around the world to find cry…
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Mission Hindenburg (The 39 Clues: Doublecross, #2)

Brand New Deliver In 6-18 Working Days
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Mission Atomic (The 39 Clues: Doublecross, #4)

Confidential until July 2016!

Checkmate.

Thirteen-year-old Dan Cahill and his older sister, Amy, are running out of time. An exiled Cahill known as the Outcast has already recreated three of history’s w…
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Mission Hurricane (The 39 Clues: Doublecross, #3)

Eye of the Storm

Thirteen-year-old Dan Cahill and his older sister, Amy, know that a disaster is about to strike the world. They know they are the only ones who can stop it, and they know they may alre…
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Outbreak (The 39 Clues: Super Special, #1)

A traitor returns.

The Cahills are the most powerful family history has ever known. For the past five centuries, they have secretly served as guardians of the world. The Cahills command presidents, tak…
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Operation Trinity (The 39 Clues: The Cahill Files, #1)

A brand new adventure from the world of The 39 Clues! 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 Cl…
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The Black Book of Buried Secrets

For the past five hundred years, the Cahills have silently dominated the world. Their desperate hunt for the 39 Clues lies behind some of history’s biggest enigmas – the curse of the Hope diamond, the…
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Legacy (The 39 Clues: Rapid Fire, #1)

Time is running out for Grace Cahill as she struggles to make the most important choice of her a decision that will shape the future of the Cahill family . . . and the world at large. After spending c…
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