Discover the mystery with the Secret Seven - your favorite detective team! These timeless stories are perfect for young fans of mystery and adventure. In the eleventh book, Jack's little sister, Susie, is very annoying! The Secret Seven are furious when they find out she has formed her own "detective gang"! When money is stolen, Susie becomes the main suspect. Solve the mystery! The cover and interior illustrations are by the talented Tony Ross, illustrator of David Walliams' books. The story was first published in 1959. This edition includes the classic text and features an additional section at the end with quizzes, puzzles, and other extra elements! Have you read all 15 books of the original Secret Seven series by Enid Blyton? Don't miss the other Secret Seven titles... Mystery of the Skull - a brand new Secret Seven adventure by award-winning author Pamela Butchart. Secret Seven Brain Games - a fun and challenging puzzle book.