In nine short stories and one brand new, never-before-seen Sherlock Holmes mystery, Laurie R. King blends her long-running brand of crime fiction with historical treats and narrative sleight of hand, that begins with England's declaration of war in 1914. As told in Mary Russell's teenage diaries, the whip-smart girl investigates familial mysteries, tracks German spies through San Francisco and generally delights with her extraordinary mind - until an unimaginable tragedy strikes.