The Obsidian Throne

Elara Voss is a cartographer who reads old maps and feels drawn to places she's never been. When a map burns in her hands and rearranges itself into a summons written in obsidian-black script, she's taken by silver-eyed fae soldiers across a shimmering veil into a world she thought was myth. King Caelan Ashvale rules the Obsidian Court through controlled cruelty and cold pragmatism. Twenty years ago, he bound a sentient shadow curse to his own body to keep it from consuming the mortal realm but the curse is eating him from the inside, and the court is dying along with him.
He needs a mortal with old blood to break the binding. He doesn't tell her this. Elara's mother disappeared when she was five. The truth lies in the fae realm, behind obsidian walls, in a language she somehow knows how to read. But the curse has a mind of its own, and it recognizes her in ways neither she nor Caelan anticipated. A dark romantasy about impossible bargains, dangerous desire, and the cost of loving something that might destroy you.