The Cursed Horde King by Zoey Draven

A bewitching spy. A ruthless king. A love that could ignite a war.

Amaia has worked hard to make her family proud. As the star apprentice to the pyroki master in Dothik, she’s weeks away from inheriting her mentor’s coveted post. But when her desperate brother begs her to take his place in the Heartstone Accords, a diplomatic exchange with their rival nation, she agrees to the unthinkable. Her mission? Cross the sea to Grym, secure work at the dragon hatchery, and spy for the throne.
But Grym is nothing like she imagined—and neither is its formidable king.
Merciless and calculated, Alaryk Arn’dyne is as feared as the ancient dragon he commands. Gifted with powerful heartstone magic that can twist minds, he’s impossible to deceive…and a dark temptation Amaia needs to avoid at all costs.
After a deadly curse strikes Alaryk’s dragon, Amaia knows she can save him, forcing a reluctant alliance with the very person she’s sworn to betray. As their forbidden attraction grows, however, she discovers a male scarred by a painful past, whose wicked needs make her burn.
But when an unexpected crime threatens to ignite a war, Amaia must choose: her home, her heart…or the ruthless king who could destroy both.