Discover the mystery with the Secret Seven - everyone's favorite detective club! These timeless stories are perfect for young readers who love mysteries, adventure, and detective series. In the second book, a priceless pearl necklace goes missing. The Secret Seven are the first to set off to catch the thief. Why? Because they saw him escape! Now all they have to do is find the necklace... Explore the mystery! The cover and interior illustrations are by the exceptional Tony Ross, illustrator of David Walliams' books. This edition includes the classic text and comes with a bonus section featuring quizzes, puzzles, and other additional material!