The English Heiress (Regency Nobles #2)
Patricia Rice

Blanche has inherited all the wealth and responsibility of a dukedom, even if it is her cousin who wears the title. Forced to rely on her men of business to help her make decisions since she has no experience or knowledge of her own, she is at constant odds with the new duke who wishes to marry her for the sake of the estate.
When the irresistible and unreliable Michael O’Toole materializes in her life to enlist her care for another of the abandoned orphans he’s rescued—as he once did for her—Blanche doesn’t know whether to kill him or kiss him. After terrorists blow up her carriage, it becomes apparent that running away might be the best choice of all—but can they survive the pitfalls of their impossible attraction?