Adult fantasy or magical realism book with selkies?

I just finished an Irish folktale collection and as much as I love folktales I would love something a little longer, more atmospheric and immersive and, as the title says, I would love if it included or was about selkies as they're my favorite creature from Irish folklore 🙏 Will also take Selkie-less recs lol I just want to be fully immersed in some Celtic mythology