Enid Blyton 
Famous 5 on the Case: Case File 7: The Case of the Hot-Air Ba-Boom! [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 seven, the Famous 5 enter a cross-country baloon race.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.