The Mesmerist by Ronald L. Smith

Jessamine Grace and her mother make their living as mediums. They have a slick trade but it's all a ruse. Jessamine is tiring of bilking people out of their money and is more and more scared about how much time her mother is spending at the bottom of an absinthe bottle.
One day, the trick goes wrong. The slate that is supposed to have a message to their client from "his daughter" instead contains a mysterious message that makes Jessamine's mother pack her up and move them both to London. There, Jessamine discovers that the man they go to meet is half-fairy and that he fought with her parents against the evil Mephisto and that she, Jessamine, has the power to speak to the dead. Her mother leaves her with Balthazar to be trained into the new League of Ravens, the protectors of England. So it's up to Jess, Emily, and Gabe to stand for the country. Why children? They apparently have more power and it lessens in adulthood so they have to be the ones to fight. Jess is only just settling in to London when she gets some horrible news... something that makes her determined to fight what is to come.
An interesting story, definitely some interesting political commentary in the current climate. A nice start (with a few starts and stops) to some world building on what could end up being a fun series.

Three and a half stars
This book comes out February 7