Livia Lone
A very strange new mystery, in which the protagonist, Livia Lone, is a beautiful, sympathetic, and competent Seattle cop who is also a serial murderer. She has good reason, or at least good rationalizations, for these killings; the victims are rapists and sex traffickers, and Livia – born in Thailand and sold by her parents – has reason to despise these men. It's also her sex kink.
In the wake of the Trump election, we might want to think twice about righteous murderers seeking vengeance for past crimes.