Interest LevelReading LevelReading A-ZATOSWord Count
Grades 4 - 8Grades 4 - 6n/a6.069911
When ten-year-old Megan helps her uncle invent the Thumbtop, the world’s smallest computer, mice are overjoyed, and they want one for every mouse hole.

The Big Cheese, leader of the Mouse Nation, has orders: follow that girl—even if it means high-tailing it to Megan’s new home on the other side of the country. While Megan struggles as the new girl, the mice watch, waiting for their chance. But when they tell Megan the biggest secret in the history of the world—mice have evolved, and they need her help—she isn’t sure anyone will believe her. With all of Mouse Nation behind her, Megan could become the most powerful girl alive, but just how will she create a Thumptop for every mouse?

Brought to life with whimsical illustrations, Prudence Breitrose’s debut novel is full of charm and adventure and will captivate today’s computer-savvy middle-graders.
Hardcover, 400 pages
Published on November 8, 2011 by Hyperion Book CH
ISBN-10: 1423124898
ISBN-13: 9781423124894
6 Book Reviews
  • lions579
    lions579about 2 years55 stars
    When the mice in Cleveland overhear that the worlds smallest computer (later called the thumtop) is going to be given to a wild megging, they get a little worried. The mice headquarters orders the Cleveland mouse chief to send three mice with the megging and the thumb top, to wherever she is going. The boss mouse (also called the big cheese) says to “Make contact” the mouse for the job is TM3, or as Megan calls him, Trey. His orders are to contact the megging and discover how to make the computer, then mass prouduce the computer to fill the mouse dream, a computer for every mouse hole. Can the mice trust Megan with the biggest secret she can hold, or will the secret get out? I personally enjoyed this book.
    • lycerujove
      lycerujovealmost 5 years
      This book is so amazing! this is by far my favorite book I have ever read i love it .You should surely read this book .
      • robodragon24
        robodragon24almost 6 years44 stars
        I recommend this book because this book is about a girl named Megan and she meets up with a different species of ? and that species wants to make a treaty with human race and that's why i recommend this book.
        • shinningboy234
          shinningboy234almost 6 years55 stars
          The mice need a less dangerous way to communicate than with human computers, so when an inventor comes up with a very small computer they get excited. Read the book to find out more!
          • sasa
            sasaover 8 years
            I like that book its really cool and because of that book we won the book olympics thing!
            • gutsy2003
              gutsy2003over 8 years55 stars
              It was a really good book and I loved it! This book is great for anyone and I hope you can read it soon! The characters were really cool like Trey, the mouse who had been trained to talk, and Megan the inventors niece, who helped to invent the Thumbtop! this book was awesome!