To Kill a Kingdom
Lira is siren royalty, the most lethal of her kind, with the hearts of seventeen princes in her collection. When she breaks her own kind's law, the Sea Queen punishes her by stripping away her song and trapping her in a human body. To return to the water, Lira must deliver the heart of Prince Elian before the winter solstice. Elian is heir to a powerful kingdom but spends his days hunting sirens at sea, and when he pulls a drowning girl from the waves, he has no idea she is the creature he most wants dead. Lira offers to help him destroy sirenkind for good, a lie that draws them across the ocean toward a reckoning neither can predict.
Where To Kill a Kingdom keeps showing up
One of our editors' lists features this novel.