P. J. McMahon

• Mystery of the Swimming Gorilla (Freaky Joe Club Secret File)
• The Freaky Joe Club
• The case of the psychic hamster
• The Case of the Singing Sea Dragons
• The Freaky Joe Club
• Aircraft propulsion
• Case of the Smiling Shark (Freaky Joe Club Secret File)
• Jet engines and rocket propulsion
• The Case of the Smiling Shark