u/Hot-Shine-6323

Years ago in elementary school I read this book about selkies. I remember it being associated with the serendipity books, same feel, size all of it and illustrations sort of. It was not a chapter book a simple vintage like picture book about a selkie. I remember there being 3 selkie girls but one was taken I believe ?? I just remember associating serendipity but I don’t know fully I just want to find this book since selkies are very special to me