Red Herring by London Miller

What goes up must always come down …
Uilleam Runehart has never faced an opponent like Karina Ashwroth—he’s certainly never had to battle against a woman that held his heart.
But if she forces his hand, he’ll have to show her why they call him the Kingmaker.
Except … Karina knows all too well why most fear him—she’s just not afraid.
She knows his strengths.
She created his weaknesses.
And in the end, she’ll show him what no other has been able to—what it means to lose …