Bridgerton: the Duke and I, Paperback Book, by Julia Quinn

Their ruse works like a charm - at first. But as Daphne waltzes across ballroom after ballroom with Simon, it's hard to remember that their courtship is a complete sham. Maybe it's his devilish smile, certainly it's the way his eyes seem to burn every time he looks at her. It wasn't the plan, but it seems she's falling for the duke, for real. And amidst the glittering, gossipy, cut-throat world of London's elite, there is only one certainty: love ignores every rule