Jack's little sister, Susie, is so annoying! The Secret Seven are furious when they discover she's formed her own detective gang! Then some money is stolen, and Susie is a chief suspect. The Seven can't quite believe it Susie wouldn't do anything that bad... would she?

Enid Blyton, who died in 1968, is one of the most popular and prolific children's authors of all time. She wrote over seven hundred books, which have been translated into many languages throughout the world. She also found time to write numerous songs, poems, and plays, and ran magazines and clubs.