Interest LevelReading LevelReading A-ZATOSWord Count
Grades 4 - 8Grades 2 - 5U4.345905
The first book in the #1 bestselling phenomenon sends readers around the world on the hunt for the 39 Clues!

Minutes before she died Grace Cahill changed her will, leaving her decendants an impossible decision: "You have a choice - one million dollars or a clue."

Grace is the last matriarch of the Cahills, the world's most powerful family. Everyone from Napoleon to Houdini is related to the Cahills, yet the source of the family power is lost. 39 Clues hidden around the world will reveal the family's secret, but no one has been able to assemble them. Now the clues race is on, and young Amy and Dan must decide what's important: hunting clues or uncovering what REALLY happened to their parents.
Hardcover, 224 pages
Published on October 1, 2008 by Scholastic Inc.
ISBN-10: 0545090547
ISBN-13: 9780545090544
200 Book Reviews
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  • hahahahThursday, March 7, 2019 at 12:00 pm
    i love this book please rate this
    • boobooWednesday, November 28, 2018 at 4:17 pm
      You have a choice 1,0000 dollars or the first clue to your familys secret. If your Dan and Amy Cahill you choose the first clue. I love books that are sad and mysterious. And this book fits my loves. I give it 5 stars.
      • Percabeth Sunday, September 30, 2018 at 6:20 am
        I think it is an amazing book! For me it’s kind of difficult to find a book series that I become obsessed with, but this book is one of the fastest books to pull me in.
        • JoshuaSunday, September 9, 2018 at 11:55 pm
          The book is great and so is this websit!!
          • aria123
            aria123Thursday, May 31, 2018 at 2:31 pm55 stars
            I have read this book and it is awesome the 39 Clues books are so awesome. I would recomend these books to any one who likes adventure.
            • coolkidbro
              coolkidbroWednesday, February 28, 2018 at 5:21 pm55 stars
              I've read the whole series, and it's amazing!!
              • artpanda
                artpandaMonday, August 7, 2017 at 10:53 am55 stars
                 BACK NEXT  When Old Grace Cahill kicks the bucket, her will reveals the first in a series of secrets that will take her heirs on an adventure around the world. Key among them are Amy and Dan Cahill, a brother and sister team determined to discover Grace's secrets. With the help of their glitter eye shadow-wearing, nose-ring-rocking au pair, Nellie, the three of them travel to Philadelphia and Paris on the trail of that guy on the front of the $100 bill: Benjamin Franklin. Along the way, they have to evade their conniving relatives. The Starling triplets interfere in Philadelphia, but are knocked out in an explosion meant for Amy and Dan. In Paris, former KGB agent Irina Spasky leads them into a trap; the Holts, a family of meatheads, almost get Amy and Dan buried alive; and their Uncle Alistair—alleged inventor of the microwave burrito—repeatedly betrays their trust. All along the way they're watched from a distance by the super creepy man in black who is secretly in cahoots with William McIntyre, Grace's attorney. Eventually, Amy, Dan, and Nellie find themselves in the Maze of Bones, an intricate series of Catacombs under Paris. There, they discover the origins of the four branches of the Cahill clan and a clue that will lead them to yet another country in pursuit of secrets behind another historical figure: Wolfgang Amadeus Mozart in Vienna, Austria. The hunt for clues is to be continued… I will tell you that you will love this series and love this book, it's full of adventure.
                • borntoswim19
                  borntoswim19Wednesday, April 19, 2017 at 2:57 pm
                  Awesome! So mysterious and intersesting!!
                  • swirlycool
                    swirlycoolThursday, March 2, 2017 at 12:19 pm55 starsFeatured
                    "You have a choice - one million dollars or a clue." - Author of Percy Jackson and the Olympians, the 39 Clues is a Cahill family competition. You either pick the million dollars or get the first clue. The Cahill family is the world's most powerful family. Name someone, they are in the family. Abraham Lincoln, Benjamin Franklin. Anybody. Even Amy and Dan didn't know they were related to people that famous. How could they be poor then? Who were their mom and dad? They had a lot of questions. Now they were stuck with their aunt. Their Grandmother Grace Cahill had left them. She was a great grandmother. I liked that Rick Riordan used words to describe the character's feelings at the time. Their au revoire is Nellie, who will take them all over the world. This book was really good. They find Clue 2 when they thought someone took it from them. I would recommend this book to mystery lovers and action lovers. I rate this 5 stars.
                    • axenmo
                      axenmoThursday, December 22, 2016 at 10:23 am55 stars
                      Very good book. If you like mysteries, and action GET THIS BOOK! It has a lot of family dispute, so it might not be for everybody out there! I recommend this, it is an awesome book with family rivalry. It is kind of what happens in real life.