The Dark Days Club, by Alison GoodmanRead about another entry on the list.
With a traitor for a mother, the orphaned Helen Wrexhall can’t afford to be anything other than the perfect Regency lady her aunt and uncle have raised her to be. Unfortunately, she has developed some inexplicable powers that are beginning to get in the way. Uncovering the truth behind her newfound abilities (and the disappearance of one of her house’s maids) lead her to Lord Carlston, a disreputable earl who introduces her to a London that’s full of demons—a London she can fight to defend, like her mother before her. But there’s one major drawback: saving the world from monsters takes a terrible toll, and there’s no guarantee it won’t slowly turn Helen into a monster herself.
--Marshal Zeringue