You May Now Bite the Bride by Ava Ross

I craft joy-infused magic for a living, but my new vampire husband rules a kingdom that’s forgotten how to smile.

When my grandmother arranges my marriage to the vampire king to form a treaty, I expect a political alliance with a brooding stranger. I do not expect to marry Kieran, the man who kissed me breathless at a magical festival six years ago, then vanished without a trace.
Now he’s all formality and frowns, ruling a kingdom full of vampires who make funeral directors look festive. And while his court thinks I’ve bewitched him, the truth is far more complex. We might still have feelings for each other…
Then his advisors announce that we have thirty days to convince the court our marriage is real, or the fragile alliance between our people will shatter.

I should guard my heart. But when Kieran’s careful control slips and my magic flares under his touch, I start to suspect the real magic isn’t in my enchantments. Maybe there’s more to my vampire husband than meets the fang.