USA Today bestselling author Christi Caldwell turns polite London society on its head in a delightful romance of unguarded hearts, second chances, and a scandalous rivalry between the sexes.

Emma Gately and the Earl of Scarsdale were betrothed as children--less a vow of future happiness than an obligation. Seventeen years later, the independent miss severs the contract with the now notorious libertine in an unprecedented act of independence. And Emma cofounds the Mismatch Society, where like-minded ladies are free of the constraints and inevitable broken hearts that men bring. But Emma's rejection sparks in her intended a new consideration of the spirited woman he took for granted--and a determination to win her back.

Despite his wicked reputation, misguided and suddenly lovestruck, Charles Hayden is on a mission to gain Emma's respect, and he has just the idea--one that the daringly unconventional Emma is sure to appreciate. But as Charles takes bold steps and sets tongues wagging, he makes himself an accidental opponent of his former betrothed. Soon a rivalry is born that has the whole ton abuzz.

Emma never anticipated that with every fiery test of wills, passion would surge. Passion that's impossible to ignore. In going toe-to-toe with Charles, she risks her heart and pride by falling in love with the one man she vowed to scorn.