The Duke of Thorns

She married a "Beast" to save a secret. She didn't expect to lose her heart to the man behind the mask. Rosamund Vane is the "useful" daughter-the invisible wallflower who fixes her family's disasters while standing firmly in the shadows. But when her sister's scandalous secret threatens to ruin the Vane name, Rosamund strikes a desperate bargain with the most feared man in London. Benedict Thorne, the Duke of Keswick, is a man of scars and silence.
Returned from the war with a shattered leg and a face the Ton calls monstrous, he has retreated to a crumbling fortress on the Cornish coast. He needs a wife to claim a massive inheritance. He doesn't need love, and he certainly doesn't need a meddling wallflower rearranging his life. The Deal: One year of marriage. No feelings. No intimacy. Just a business transaction to unlock a fortune and bury a scandal.