The Earl of Zennor (The League of Rogues, #18)

She's no fair lady...he's a wild rogue... When Trystan Cartwright, the Earl of Zennor is bored he makes wagers...dangerous ones. One night in a grimy little tavern in Penzance, he and his friends stumble upon a wild, hellcat of a woman masquerading as an ill-tempered lad. Unable to resist the temptation of such a challenge, Trystan wagers he can turn the little hellion into a lady in less than one month. To win he'll have to present her at a ball in London and fool the beau monde. But he never imagines that his lady lessons will lead to love... Bridget Ringgold believes her worst nightmare has come true when three handsome gentlemen abduct her from the stables where she secretly lives. The devilish man who calls himself Trystan tells her she's part of a wager and that she'll learn to be a lady within the next thirty days and if she succeeds, she'll be given the means to live a life she's only ever dreamed about. But it's easier said than done with Trystan drives her mad with his endless lessons, yet the moment she waltzes in his arms, she realizes she's in danger of losing her heart...