Rose Campion and the Christmas Mystery

It's pantomime season at Campions' Palace of Varieties and Wonders — but Rose Campion and her friends have more to worry about than who'll be filling the role of Cinderella.
The Duchess — the deadly ruler of the London criminal underworld — has been released from prison, and she has her sights set not only on Rose, but also on a pricesless emerald necklace that has just arrived in the city.
Meanwhile, Campions' is playing host to the mysterious hypnotist Madame de Valentina — but how is she able to communicate with the souls of departed loved ones . . . before they've died?