A Winter with the Rakish Duke by Tessa Brookman

“Are you still trying to seduce me?”
“I’m sure there’ll be time for that.”
Lady Eloise Brooks has never known what it means to be loved. Until she’s dragged to a masquerade ball and finds herself kissing a masked man senseless. Determined to uncover his identity, she’s forced to make a deal with the devil: the rakish Duke Simon.
Cold, rakish, and ruthless, Simon Comeford, the Duke of Richmond, is notorious throughout the whole of England. Behind his mask is a dark past, one he refuses to reveal to anyone. But when a virginal wallflower finds herself trapped in his castle, he offers a dangerous truce.
She must spend five nights with him in exchange for his help.
Their steamy encounters are enough to awaken an unspoken desire inside each of them. But as the days close in, Simon must confront his traumatic past before Eloise is forced to face her inevitable future. And before they lose each other forever…