Solve the mystery with the Secret Seven - everyone's favourite detective club! These timeless stories are perfect for young fans of mystery, adventure or detective series.
In book eleven, 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.
Solve the mystery!
Cover and inside illustrations are by the brilliant Tony Ross, illustrator of David Walliams's books. The story was first published in 1959. This edition features the classic text and comes with a Bonus Blyton section at the back with quizzes, puzzles and other bonus extras!