Forbidden Empire by Sienna Snow

She stole from the empire. He’ll stop at nothing to reclaim her.

Esme vanished into the shadows of Vegas, taking a dangerous secret with her. Aidon, ruthless king of the city’s darkest empire, is determined to hunt her down—and make her pay.
But when he finally traps her, lines blur between hatred, desire, and obsession. Bound together by mutual enemies and undeniable heat, they must navigate a treacherous web of power, betrayal, and temptation. In a city ruled by violence and sin, surrender is dangerous, but escape is impossible.
Now, caught between revenge and irresistible attraction, Aidon and Esme must decide: will they destroy each other—or rule the darkness together?

Forbidden Empire is a scorching dark romance filled with morally grey characters, intense passion, and dangerous games.