The tenth in the Fleming Stone series of mystery novels, 'The Diamond Pin' is a classic whodunnit. Fabulously wealthy Ursula Pell is fond of playing tricks on her family and friends – much to her delight and their distaste. They dare not protest, for fear of being left out of her sizeable will. One day however, her niece Iris reaches breaking point. When Ursula is found murdered in a locked room, is Iris to blame? Or is there more to the crime than meets the eye? Detective Fleming Stone is on hand to help get to the bottom of it. A thrilling crime mystery from popular American author Carolyn Wells.