Castle Shade (Used Hardcover) - Laurie R. King
The queen is Marie of Roumania: the doubly royal granddaughter to 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, single-handedly transforming Roumania from a backwater into a force.
The castle is Bran: a tall, quirky, ancient structure perched on high rocks overlooking the border between Roumania and its newly regained territory of Transylvania. The castle was a gift to Queen Marie, a thanks from her people, and she loves it as she loves her own children.
The threat is. . . now, that is less clear. Shadowy figures, vague whispers, the fears of girls, dangers that may only be accidents. But this is a land of long memory and hidden corners, a land that had known Vlad the Impaler, a land from whose churchyards the shades creep.
When Queen Marie calls, Mary Russell and Sherlock Holmes are as dubious as they are reluctant. But a young girl is involved, and a beautiful queen. Surely it won't take long to shine light on this unlikely case of what would seem to be strigoi?