Interest LevelReading LevelReading A-ZATOSWord Count
Grades 4 - 8Grades 6 - 8V5.6118460

Dozens of children respond to this peculiar ad in the newspaper and are then put through a series of mind-bending tests, which readers take along with them. Only four children-two boys and two girls-succeed. Their challenge: to go on a secret mission that only the most intelligent and inventive children could complete. To accomplish it they will have to go undercover at the Learning Institute for the Very Enlightened, where the only rule is that there are no rules. But what they'll find in the hidden underground tunnels of the school is more than your average school supplies. So, if you're gifted, creative, or happen to know Morse Code, they could probably use your help.

Hardcover, 485 pages
Published on March 7, 2007 by Little, Brown Books for Young Readers
ISBN-10: 0316057770
ISBN-13: 9780316057776
130 Book Reviews
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  • owl5day
    owl5dayWednesday, October 2, 2019 at 7:17 am55 stars
    It is so good i can not wait to read book 2 it is so thrilling i love it is is in my top 10 favorite books .
    • lawalex
      lawalexMonday, June 17, 2019 at 10:37 am55 stars
      This book is a great read, and filled to the brim with puzzles. This book is immpossible to put down. With lovable characters and an evil master mind to defeat, this is sure to be an adventure!
      • ochaco_uraraka
        ochaco_urarakaTuesday, April 30, 2019 at 12:27 am55 stars
        This book was really great. Clever characters, Tricks and Turns, and Secrecy and Stealth, this book was a true beauty! Filled with Puzzles and Riddles, a group of children get together when they pass a mysterious test. They meet terrible and kind characters along the way, and one of those fellows that landed in the good side was Mr. Benedict, the benefactor of that event. He asked them to do something none of them had ever done in their lives: Becoming Agents. Some were less enthusiastic as others, but they soon realize they could not imagine a world where they were not together. Can they put their minds together and find out what Mr. Curtain is up to? It is up to these four young kids to stop something terrible from happening, and they named themselves after the beloved man who brought them together in the first place: The Mysterious Benedict Society.
        • joohyuun
          joohyuunWednesday, April 17, 2019 at 6:11 pm55 stars
          I decided to read this book because a lot of my friends encouraged me to try out the book. Since so many friends made me read it, I decided to check it out thinking it would be a normal book that I read every day. However, when reached the end of the page of the book, I realized that I was wrong and It was the most terrific book I ever read. I think people should try the book because it's a really good book for people who love adventurous and mysterious books.
          • hiSaturday, February 9, 2019 at 6:04 pm
            • hiSaturday, February 9, 2019 at 6:04 pm
              This book was the best book ever.
              • gilboi
                gilboiFriday, February 8, 2019 at 10:59 am55 stars
                It is THE most amazing spy series out there!
                • rrrrrrSaturday, January 26, 2019 at 4:36 pm
                  this book is awesome
                  • gamer527
                    gamer527Monday, January 14, 2019 at 4:27 pm
                    I read this book In two weeks and it is 500 pages. it is an amazing book and I really recommend it to anybody who loves adventure books.
                    • shootingstars
                      shootingstarsWednesday, January 9, 2019 at 7:37 am55 stars
                      I love this book! It’s filled with mysteries and clues and will keep you up all night!