The Mesalliance — Fenella Miller

Lady Allegra Humphry knows her place is at the top of the aristocratic tree and she has no time for cits. But if she and her twin brother, Richard, the Earl of Witherton, wish to retain their position in society they will have to make compromises. Self-made millionaire Silas Tremayne now owns St. Osyth Priory, Allegra's ancestral home, and is determined to own her as well. Rejected by the haut ton, Silas believes he has the perfect plan to ensure both he and his daughter, Demelza, will soon be welcome in the best drawing rooms. Marriage is the answer! But there are people who do not wish to see the union proceed and are prepared to commit murder to stop it.