The 39 Clues: Unstoppable Book 3: Countdown

Interest LevelReading LevelReading A-ZATOSWord Count
Grades 4 - 8Grades 3 - 5n/a5.043190
Life or Death

The clock has run out for thirteen-year-old Dan Cahill. As head of the most powerful family the world has ever known, he and his older sister, Amy, have been in the crosshairs for too long. Dan and Amy have always managed to stay a step ahead of their enemies, but it was only a matter of time until luck failed them.

Now Dan is hopelessly trapped and nothing can save him. Nothing except unleashing an evil into the world even worse than the enemies closing in. As Dan hovers between life and death, Amy has a terrifying decision to make. Just how far is she willing to go to save her little brother?
Hardcover, 192 pages
Published on April 29, 2014 by Scholastic Inc.
ISBN-10: 0545521459
ISBN-13: 9780545521451
2 Book Reviews
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  • SidMonday, April 2, 2018 at 5:22 pm
    This book is about Amy and Dan Cahill, who are trying to stop J. Rutherford Pierce, who has control over a "super-power enhancing serum", from becoming President of the United States. It has lots of thrills and cliffhangers. It is a good book, even though (spoiler alert) a character dies.
    • penguin313
      penguin313Tuesday, March 10, 2015 at 5:21 pm55 stars
      I read the first series and most of the second, and now i read this one. It was a good story, though leaves you hanging.