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
193 Book Reviews
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  • 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.
        • sm0913
          sm0913Friday, December 16, 2016 at 7:38 am
          I think this was a great book. It is about a family competition that Amy and Dan participate in against there family members. It is a competition of 39 clues you have too discover too find things that will make the most powerful family in the universe. I hope you like it.
          • nish2580
            nish2580Friday, December 16, 2016 at 7:33 am55 stars
            I think this book was really awesome. If you like mystery's, treasure hunt, awesomeness I would really recommend this book to you. HOPE YOU LIKE IT!!!!!!!!!!!! :))
            • twilightrose
              twilightroseSunday, August 21, 2016 at 5:39 am
              Dan and Amy Cahill set out on a hunt set by generations of famous ancestors hoping to collect clues, about the hunt, about their heritage, and most ominously about the death of their parents. This book was underdeveloped and I set it down feeling unimpressed. I would not recommend this book to anyone after having read all ten in the series. Overall, an underwhelming 190 page book. I give it 2 stars
              • cuterabbit
                cuterabbitSaturday, August 20, 2016 at 12:01 am55 stars
                i hace gotten 36 clues!
                • mayhem
                  mayhemThursday, August 18, 2016 at 12:09 am55 stars
                  THIS IS GOOD. (exiting)
                  • mayhem
                    mayhemWednesday, August 17, 2016 at 11:55 pm55 stars
                    THIS IS GOOD
                    • leecifur
                      leecifurTuesday, August 16, 2016 at 6:41 am55 stars
                      This series is AMAZING!!