The Blue Diamond

In this gripping installment of the Daughter of Sherlock Holmes mystery series by Leonard Goldberg, Joanna and the Watsons are thrust into a high-stakes investigation during World War One. When a priceless blue diamond, intended for King Edward as a symbol of loyalty from South Africa, is stolen from the heavily guarded Windsor Hotel, Scotland Yard finds itself stumped. With the potential to turn the tide of war in favor of the Germans, Joanna and her team must race against time to recover the gem before its whereabouts can cause catastrophic consequences for the allied forces.