I just finished An Affair of Poisons, and I loved it. It's an alternate history tale of a Shadow Society that poisons King Louis XIV and then takes power. There are two perspectives, one told by the daughter of the Shadow Society leader, and a bastard prince who is fighting to save his sisters. The two meet and try to take back the city in the name of the boy's brother, the dauphin Louis. I thought it was a beautiful story with strong characters.