Solve the mystery with the Secret Seven gang - everyone's favorite detective club! These timeless stories are ideal for young readers who love mysteries, adventures, and detective series. It's their first adventure, and the super-detectives of the Secret Seven are already on the trail of a mystery! The gang is dressed in costumes and follows a path to a scary old snowy house... Solve the mystery! The cover and internal illustrations are by the brilliant Tony Ross, illustrator of David Walliams' books. The story was first published in 1949. This edition contains the classic text and comes with a Blyton Bonus section at the end with quizzes, puzzles, and other extra activities!