King of the Mountains by Elizabeth Frost

Kill the King.
Save the world.
Don’t die.

Morgan has no problem killing the king, especially since the alternative is being locked away for all her other murders… But he doesn’t make it easy.
First off, he’s a bearded, sexy wild man who chops firewood shirtless in his backyard. Second? He’s created an entire dimension hidden from the human realm, where he controls everything.

Literally everything.
The longer she’s in his realm, the more she realizes he’s wiggled his way under her skin with his sexy smirk and stupid beard. What’s worse? She might let him end the world if she gets to keep him.