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 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! But the friends are soon left stumped by some confusing clues. Will they manage to stop the thief before he gets away?
Solve the mystery!