Absolutely one of the best in the series. I think Ms. Thompson has found her stride writing Frank and Sarah and the supporting cast. They have all become a team who solves crimes at the turn of the century. Wonderful use of historical facts woven into the story. Although I had guessed the unspeakable crime hidden in the background, if was fun to see it unfold in the story. There was actually even some passion between Frank and Sarah, even if it was subtle. Looking forward to seeing the Maternity Hospital take flight and it would be nice to see more of Catherine and Brian in the next story. Really nice addition to the Gaslight series.