Upon a Starlit Tide by Kell Woods

I had picked out the Cinderella and Little Mermaid (the 'real' one, not the Disney version) vibes quite early on in this book. Woods mentions in an afterword that Bluebeard and a Bretagne folk tale are also woven into the bones, making a rich tapestry of fairy tales retold and reimaged.

An alternate history, with Fae quite openly in the world, Woods spills a lush tale of love and betrayal set against 18th century Brittany shipbuilding and sea faring culture.

I did find this a bit hard to get into, but once I'd gotten about a quarter of the way through, something about the story grabbed me by the throat and I couldn't put it down.

I would recommend this for older teens and up, it's masterfully done.