Madame Koska & the Imperial Brooch (Madame Koska Mysteries)

Meet Madame Koska—a fabulous haute couture designer and the owner of a new atelier in 1920s London who has a knack at solving crimes that baffle the police. When a priceless brooch disappears from a museum in Russia, Madame Koska is suddenly drawn into the mystery. But who is Madame Koska? And what does the missing jewel have to do with her?