A queen, a castle, a dark and ageless threat--all await Mary Russell and Sherlock Holmes in this chilling adventure. The queen is Marie of Roumania: the doubly royal granddaughter of Victoria, Empress of the British Empire, and Alexander II, Tsar of Russia. A famous beauty who was married at seventeen into Roumania's young dynasty, Marie had beguiled the Paris Peace Conference into returning her adopted country's long-lost provinces,...