#6 The Secret of the Puzzle Box

Join the Code Busters Club kids -- Cody, Quinn, M.E., Luke and Mika -- as they solve mysteries by cracking secret codes. Follow them to a Haunted House, Alcatraz Prison, the Carmel Mission, an Egyptian Museum, the International Spy Museum, Angel Island, Winchester Mystery House, and more. Learn how to decipher codes such as Morse Code, Semaphore Code, American Sign Language, Phonetic Alphabet, Pigpen Code, Washington Code, and many many more! But watch out for Matt the Brat ... who seems to be lurking behind every corner ... 

Coming January 1, 2024... Books 7, 8, 9, and 10!

Check out the author's website at

Meet The Code Busters:

#3 Mystery of the Pirate's Treasure 

​​​​#8 The Science

Fair Scheme 

Buy the books here: 

Fan Reviews 

#10 The Clash of the Code Clubs

#5 Hunt for the Missing Spy

​​#9 The Haunting of Mystery Mansion 

#1 Secret of the 

​    Skeleton Key

#2 The Haunted   Lighthouse

#4 The Mummy's Curse   

Contact Penny Warner at pennywarnerink@yahoo.com

#7 A Disappearance

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