The Secret of the Skeleton Key

From the Series The Code Busters Club

  • Interest Level: Grade 3 - Grade 6
  • Reading Level: Grade 4

Cody, Quinn, Luke, and M.E. may not have much in common with each other, but they do love playing around with codes. In fact, they love codes so much, they have their own private club, with a super-secret hideout and passwords that change every single day. When Cody and Quinn notice what could be a code on the window of their neighbor’s house—the neighbor they call Skeleton Man—the club gets to work. And it is a cry for help! Now the Code Busters are on the case—and nothing will stop them from solving the mystery and finding the secret treasure that seems to be the cause of it all! This exciting interactive mystery offers more than fifteen codes for you to decipher, including the Consonant code, Morse code, and American Sign Language. Test your brain with the Code Busters and solve the mystery along with them. Answers are in the back, if you ever get stuck.

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Interest Level Grade 3 - Grade 6
Reading Level Grade 4
Copyright 2011
Publisher Lerner Publishing Group
Imprint Darby Creek ™
Language English
Number of Pages 224
Publication Date 2011-08-01
Text Type Fiction—Mystery
BISACS JUV028000, JUV001000
Dewey [Fic]
Dimensions 5.5 x 8.25
Lexile 710
Guided Reading Level U
ATOS Reading Level 4.7
Accelerated Reader® Quiz 146247
Accelerated Reader® Points 4.0
Features Author/Illustrator biography, Awards, Reviewed, and Table of contents

Author: Penny Warner

Penny Warner has published more than 60 books for both adults and children. She teaches child development at a local college in California. You can join the Code Busters Club at


  • Agatha Award Nominee, Nominated, 2011


The Bulletin of the Center for Children's Books

“The villains are deeply villainous, the heroes remarkably heroic, and the plot, while a bit of a stretch, is a whole lot of fun. The final pages point to a second installment set on Alcatraz Island; expect requests upon return of this volume.” —The Bulletin of the Center for Children’s Books

Kirkus Reviews

“This intriguing tale has vivid characters and such a tantalizing cliffhanger that the readers won’t be able to resist cracking the next Code Busters.” —Kirkus Reviews