The Ocean Girl: A Fairy Tale with Benefits. Sylvania, #3

She escaped his net, but now he's caught her heart. Muri was resigned to being the tenth bride of the king of the merfolk-until he disappeared on land. Now she has mere days to find him among the treacherous fairies and dim-witted humans before the throne is forfeit and his menacing rival takes control of the merkingdom. Her first shimmering glimpse of a human in a boat is so captivating, his fishing net almost ensnares her.
But once on shore, she discovers that the fairies are kind, and the humans intelligent. And the man who almost caught her-a fish-catcher named Jack-is utterly handsome. Muri needs to warn the mermaids that the merking won't be returning-he's lying drunk in the village park, unable to shift to merman form. But she hesitates to leave the village. Muri wants to learn more of this place where humans and fairies help each other, women and men are equals, and rulers are chosen by everyone.
And she wants to spend more time with Jack. But the merking's rival is coming for her. He'll threaten the whole village to force her to return home. To keep Jack safe, she'll have to leave him. The Ocean Girl is a cozy fantasy romance in a fairy tale setting with lighthearted magic. It's the beach read Éowyn packs when she goes on vacation. The Ocean Girl contains love scenes. The Ocean Girl can be read on its own but may contain spoilers for earlier books in the series.