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Unstoppable Logo
Author:Various Authors
Publication Date:2013/2014
Pages:Varies by Book
Setting:Various Places
Preceded By:Cahills vs. Vespers
Followed By:N/A

Unstoppable is the series that will follow the Cahills vs. Vespers series. It will have four books.  Publisher's Weekly said: "The new storyline sends protagonists Amy and Dan Cahill on even further-flung adventures as they explore the lost civilizations of the world."

For more information regarding the third series click here


The 39 Clues is unstoppable! The bestselling series returns with an adventure spanning four explosive books and a website that places readers right in the action.[2]


Amy and Dan explore the lost civilizations of the world in these books.

Book One: Nowhere To Run

This book is curently being written by Jude Watson. It will be released October 1st, 2013.

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 the serum got into the wrong hands, the disaster would rock the world. So certain Cahills have always made it their mission to keep the serum safe, buried, locked away. Until now.

Thirteen-year-old Dan Cahill and his older sister, Amy, are the latest guardians of the Clues. They think they've done everything right, but a tiny mistake leads to catastrophe. The serum is missing and Dan and Amy have to get it back and stop who stole it . . . before it's game over. For everyone.

Sneak Peek can only be viewed once you finished Day of Doom Mission.

Book Two:

This book will be written by Jeff Hirsch. It will be released in January 2014.

Book Three:

This book will be written by Natalie Standiford. It will be out in May 2014. The author, herself, has not yet decided for a title. She posted some news on her blog and she has not put a title in it.

Book Four:

The series "finale" will be written by Gordon Korman. It will be released in August 2014.

Books' Release Dates

Unstoppable Authors and Book Covers

  • The starting point of Unstoppable (at the end of Day of Doom)
  • Jude Watson will write 39 Clues Unstoppable Book 1 Nowhere To Run
  • Cover for Book 1, Nowhere to Run
  • Jeff Hirsch will write 39 Clues Unstoppable Book 2
  • Natalie Standiford will write 39 Clues Unstoppable Book 3
  • Gordon Korman will write 39 Clues Unstoppable Book 4

Start a Discussion Discussions about Unstoppable

  • Titles

    3 messages
    • But they do sound cool ps. Check out Jeff Hirchs website really cool.
    • Yeah. Book two is breakaway
  • New series

    68 messages
    • I found out run now (book 2) and brace yourself (book 3) titles where hast rumors spread :(
    • Ps check out Jeff Hirshes website really cool. :)

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