Dance of the Forest King by Alessa Thorn

Magic between the human world and Faerie is dying, and it’s going to take more than the average heroes to heal the rift. It will need the Lost Fae Kings.

King Oberon and his brothers, Taranis and Mananan, have been separated from the rest of Faerie and their family, the Tuatha Dé Danann, for centuries. With Morrigan and her generals dead, they are finally free to roam both realms once more.
Curses and rampaging goddesses have left their scars on both the human world and Faerie and they are going to need not only their immense magic to repair the rifts; they are going to need family. They just don’t know how big their family has gotten in their absence.
Oberon will sacrifice himself to save the worlds if he has to. He’s the eldest and if anyone is going to die for magic, it’s him. That’s the plan… right until he meets his fated mate in all the chaos and she blows his plan to hell.
Chrissy loves magic more than she loves chocolate brownies and fantasy books. Being the best friend to Elise and Prince Kian has showed her that magic not only exists in the world, but that it’s worth fighting for. The problem is, she doesn’t have a drop.
When Oberon declares Chrissy is the one that will help save the worlds, and that he will make her magic rise, she can’t believe her ears. She’s going to learn there are some things you can’t say no to, and when the King of Forests wants something, he won’t stop until he gets it.

They might have a chance to save magic, but none of the Tuatha Dé Danann family will be ready for the darkness growing in the human world. It doesn’t only want to break the two worlds magical connection, but unleash ancient horrors on both.