The Midnight King. Cycle of Calamity, #2

A king should know better than to make an enemy of his wife. Hours after her wedding, Aurora stood over her husband with a blade to his throat. Desperate to slay his beasts before they doom her world, she made a reckless bargain-become a pawn to a despicable queen in exchange for royal status and an army. But even a princess' tiara might not be enough to destroy the beasts her husband created. Theron has been outplayed by his traitor bride.
He should be furious that he's returning home with an enemy army nipping at his heels, except he can't fully hate the beautiful new wife who outwitted him. Convinced he can win Aurora back and turn her army around, Theron offers her something irresistible-help mastering her time magic. Neither Aurora's insolent soldiers nor her cunning husband can be fully trusted. Yet the closer she gets to Theron's kingdom, the blurrier the line between friend and foe becomes.
All Aurora knows for certain is that if she fails to master both her magic and her heart, the tragedies of history are doomed to repeat themselves. Inspired by the Legend of Zelda, The Midnight King is the second epic fantasy romance novel in the Cycle of Calamity series. If you love time travel, court intrigue, and enemies to lovers romance, escape into The Midnight King!