Enid Blyton 
Famous 5 on the Case: Case File 13: The Case of the Guy Who Makes You Act Like a Chicken [EPUB ebook] 

A new generation Famous Five: Jo, Dylan, Allie, and Max are the children of the four kids – and not forgetting Timmy II to make up the Five!In book thirteen, the circus and a hypnotist come to town.The Famous Five meet Scooby Doo! All the heritage of the original Famous Five – adventure, mystery, action – combined with a great modern-day feel and lots of laughs.All 24 books in the series feature black and white inside illustrations and have been adapted into an animated television series for the Disney Channel.