By His Vow: An Arranged Marriage Billionaire Romance (Callahan Billionaires Book 1)

When her father dies and leaves her shackled to the one man she's spent years despising, Sloane discovers that grief is the least of her problems.

As the daughter of a powerful businessman, Sloane never expected much from her inheritance — just the cottage she's always loved, the only place in her gilded world that ever felt real. What she gets instead is Kingston Callahan: her brother's insufferable best friend, a man built from arrogance and ambition, and — courtesy of a clause buried in her father's will — her husband for the next twelve months.

Kingston is everything Sloane hates about the world she was born into. Commanding, ruthless, and infuriatingly sure of himself, he's used to getting exactly what he wants. And apparently, what he wants now is her — bound to him by vow, living under his roof, and completely at the mercy of a deal neither of them chose.

But forced proximity has a way of dissolving even the most stubborn hatred. Behind closed doors, the tension between them shifts from cold war to something far more dangerous. Kingston isn't just her enemy anymore — he's the man who sees her in ways no one else ever has.

The arrangement has rules. Feelings aren't part of the contract.

So why does every stolen glance feel like the beginning of something neither of them can take back?

USA Today and Wall Street Journal bestselling author Tracy Lorraine delivers a scorching, emotionally charged arranged marriage romance that proves the line between hate and love was never as solid as it seemed.