A novella(?) set in the author’s Dominion of the Fallen series, with a tight little murder mystery embedded in the familial/court politics of the underwater dragon kingdom. Lots of drama, angst, peril, and socio-political negotiation to provide distraction from the murder. And that’s just between our dragon & fallen angel married protagonists. I’m going to guess that this story might be a bit too in media res for any reader who hasn’t read the Dominion novels, but you should go read those because they’re really good.