The bachelor list / Jane Feather.

Enhanced descriptions from Syndetics:

In this exhilarating new trilogy from New York Times bestselling author Jane Feather, a trio of spirited sisters secretly run a thriving matchmaking service. But these three good catches of impeccable pedigree have little interest in matrimony themselves - until, one by one, they meet their matches.
Constance Duncan may be the eldest of three sisters, but she has more important things on her mind than finding a husband - for herself, at any rate. Through the Personals services of her popular newspaper, The Mayfair Lady, Constance connects lonely hearts. But her own heart lies in her work, and nothing will distract her from it - until she finds herself irresistibly drawn to a man of disastrously different views. Max Ensor is a politician whose outmoded attitudes outrage her - even as his powerful presence intrigues her. Clearly there is only one thing to do with such an exasperating man- convert him! Little does Constance know that Max has the same plan in mind for her.... What follows is a fiercely passionate duel in which two headstrong people discover that, differences or not, sometimes one gender cannot - will not - do without the other.