From my Kirkus column, which focuses on how it diverges from the classic formula of the romantic historical mystery:
Loved this one.
Traditionally, Our Fair Heroine finds the rules of polite society somewhat chafing, but, as she was born into them, she understands them. Even if her behavior causes gossip, she is almost always still easily accepted.
Violet, on the other hand, is pretending. She wears the clothes and receives the invitations, but despite her manners and her appearance, she’s still a girl from Cheapside. Her position forces her to lie—through word and action—to everyone she meets. She doesn’t know the rules of high society very well, and she’s always aware that one misstep will expose the entire charade.