Holden — Andrea Speed

Mean Streets: Book One
From the Infected Universe

With his friend lion shifter Roan McKichan no longer in the picture, former sex worker Holden Krause is now working as a detective investigating cases in Seattle. When he receives a request to investigate a rather unusual case for Big Mike, a local drug dealer, he ignores the potential hazards in working for such a client and takes it on.

But Holden hasn't given up his vigilante ways, occasionally seeking violent retribution for those ignored by the justice system. There's a man stalking the streets, assaulting anyone he perceives to be trans or gender-nonconforming in any way. When the brutality escalates, the case becomes personal for Holden. 

If he cannot juggle being both a detective and a vigilante, his taste for blood and danger might finally catch up with him.