No Business Like Snow Business by Lisa Henry

Harvey Novak loves living in Christmas Falls. He loves his job running the Festival Museum too, except when it means he has to deal with his ex, who’s putting together the town’s newest tourist brochures. There are a lot of things Harvey is willing to do for Christmas Falls, but playing nice with the guy who cheated on him isn’t one of them. When a real-life Christmas mystery falls into Harvey’s lap, it offers the perfect distraction. And the guy with the mystery is pretty distracting too.
Sterling van Ruyven has come to Christmas Falls to look for his long-lost uncle, and enlists Harvey’s help to track him down. It’s all business—if there’s an extra van Ruyven heir out there somewhere, Sterling needs to know about it. He isn’t expecting to actually enjoy spending time in this ridiculous Christmas-themed town with the cute guy from the museum.
Their fun flirtation turns into a holiday fling, but that’s all it can ever be. Harvey’s heart belongs in Christmas Falls, and Sterling hasn’t found his yet. But maybe Christmas is the time for miracles after all.

Christmas Falls is a multi-author M/M romance series set in a small town that thrives on enough holiday charm to rival any Hallmark movie.