The Undermining of Twyla and Frank (The Undertaking of Hart and Mercy #) by Megan Bannen

From the author of The Undertaking of Hart and Mercy comes a heartwarming fantasy with a best friends-to-lovers rom com twist--When Harry Met Sally, but with dragons!—set in the delightful demigod and donut-filled world of Tanria.

The entire town of Eternity was shocked when widowed, middle-aged Twyla Banneker partnered up with her neighbor and best friend, Frank Ellis, to join the Tanrian Marshals. Eight years later, Twyla and Frank are still patrolling the dangerous land of Tanria, the former prison of the Old Gods.

Twyla might look like a small town mom who brings cheesy potatoes to funerals and whips up a batch of cookies for the school bake sale, but her rewarding career in law enforcement has been a welcome change from the domestic grind of mom life, despite the misgivings of her grown children.

Fortunately (or unfortunately) a recent decrease in on-the-job peril has made Twyla and Frank's job a lot safer ... and a lot less exciting. So when they discover the body of one of their fellow marshals covered in liquid glitter--and Frank finds himself the inadvertent foster dad to a baby dragon--they are more than happy to be back on the beat.

Soon, the friends wind up ensnared in a nefarious plot that goes far deeper than any lucrative Tanrian mineshaft. But as the danger closes in and Twyla and Frank's investigation becomes more complicated, so does their easy friendship. And Twyla starts to realize that her true soul mate might just be the person who has lived next door all along...