First off: if you’re like me and don’t pay enough attention, you might miss that this book is the first of a duology. It very much just comes to a stop, and will require the second volume to become a full story. You might want to hold off until you have your hands on both of them to start reading, because they’re the same story.
Anyway, The Five Daughters of the Moon is a historical fantasy based on the story of the Russian revolution. If you know the story of the Romanov sisters, you know there’s not likely to be a happy ending coming — and you know which characters to be suspicious of. Each chapter is told from the point of one of the five girls, from the youngest to the oldest. Likitalo actually does a pretty good job of distinguishing each of the voices — you wouldn’t think Sibilia was Celestia or Alina when reading, for a certainty — but Alina’s narration, at six years old, sounds rather too mature for her age.
Setting that aside, it’s beautifully written, and the worldbuilding that emerges slowly is lovely. The idea of the Empress being married to the moon, the arrangement whereby each of the girls has a different earthly father (or “seed”) but is considered a daughter of the Moon, the soul beads — it isn’t all immediately apparent how it works, but as you need to know, you learn. I think that’s well done.
Overall, a fascinating novella retelling, to my mind, but I do wish the two books had come out together (or that it was just sold as a novel).