An Anubis Gates novella.
Jacky, our friendly cross-dressing girl set on avenging her fiancé from Anubis Gates, is featured in this novella where she encounters a woman being haunted by her dead husband. She saves her life, in fact, when the husband's ghost sets his wife on fire. So this story is all about exorcising ghosts since interacting with the husband's ghost wakes up the ghost of her fiancé (who is haunting her, naturally) and this makes them both magnets for all the other ghosts in the area. Apparently ghosts can see footsteps so to get away they have to climb and take a cab and they end up on the river seeking Nobody's help.
I saw this at the library and picked it up on a whim because I quite liked Anubis Gates. It was a quick read and kind of fun.