At a Witch's Back - Witches in the City, #4

Vanessa has hated kelpies ever since she was attacked by one as a child. As a witch, it's her job to protect humans from fae depredations -- so when she learns that the fae have mounted an assault on the city, and a kelpie is among them, she's determined to take it down. The last thing she expects is for her target-turned-captive to tug at her heartstrings. Ruby's never had much use for anyone but herself.
She'll help the fae take the city, and follow orders to catch a witch, because why not?But then she's captured by the witch she's hunting, and everything changes. Can Vanessa and Ruby overcome their mutual distrust to save Ruby's life and protect the city? And is there room, in this strange new world, for the attraction blossoming between them?