In book two a priceless pearl necklace goes missing. The Secret Seven are first off the mark to catch the thief. Why? Because they saw him making his escape! Now all they have to do is find the necklace...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 1950 This edition features the classic text and comes with a Bonus Blyton section at the back with quizzes, puzzles and other bonus extras!