Operation Trinity (39 Clues: The Cahill Files, Book 1)

Interest LevelReading LevelReading A-ZATOSWord Count
Grades 4 - 8Grades 4 - 6n/a5.732933
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 Clues. And for 500 years, they've kept their secrets silent. Until now.

This extraordinary stand-alone novel cracks open the Cahill vault to tell the story of the most coveted piece of artwork in the world, a masterpiece that has been the target of seven separate theft attempts: Jan van Eyck’s altarpiece at Ghent. OPERATION TRINITY chronicles the first Vesper attack on the altarpiece in the 1600s, then jumps to WWII and young Grace Cahill’s desperate bid to save the masterwork from the Nazis. The final piece of the novel tells the story of Ian and Natalie Kabra’s first solo operation and features an 11th hour appearance by Grace Cahill on her final mission.

History will never be the same.


Hardcover, 144 pages
Published on May 8, 2012 by Scholastic Inc.
ISBN-10: 0545431433
ISBN-13: 9780545431439
3 Book Reviews
Add a Rating
  • tadashawalters
    tadashawaltersFriday, March 15, 2013 at 8:45 am55 stars
    i love the book
    • katjune62
      katjune62Friday, March 1, 2013 at 10:52 pm55 starsFeatured
      Think you now everything about the Cahills? Guess again! Secrets have been released from the Cahill vault, secrets never before seen, that could change the world.
      • lillianna765
        lillianna765Monday, December 17, 2012 at 4:54 pm55 stars
        It's like a different series. When are The 39 Clues books going to end? Not that I want it to end! I really love the books.