The Constantine Affliction by T. Aaron Payton (Night Shade Books, 2012) is a steampunk detective story, set in an alternate London where a sexually transmitted disease has recently begun spreading, killing many and changing the sex of the survivors. This is central to the plot, but not in the way that it would be in a story that’s solidly in the TG fiction subgenre; none of the viewpoint characters are transformed, though a couple of major supporting characters were transformed in the backstory, and one other is transformed in the course of the story, though not onstage.