This steampunk mystery/romance takes place in an England that has just thrown off the conquering Horde. The hero who saved the country is the Iron Duke - Rhys Trahearn who was a former pirate. Our heroine Mina Wentworth is a Detective Inspector, the daughter of an Earl, and the mixed blood result of one of the Horde's Frenzies. She looks like the hated Horde and faces much prejudice in England. She is called to the Iron Duke's home when a corpse is found on his front porch. The murder investigation quickly escalates to a vast conspiracy designed to change England and murder millions. Rhys sees Mina and wants her. Mina is much more wary. This was an excellent story with two great characters.