A Lady at Midnight — Melinda Hammond

When Amelia Langridge accepts an invitation to stay in London as companion to the beautiful Camilla Strickland, her thoughts are merely to enjoy herself a little before settling down as the wife of dull but dependable Edmund Crannock. When Camilla attracts the attention of pleasure-loving Earl Rossleigh, it seems that she has found herself a husband as well. But the Earl is intent on another, much more dangerous quarry, and it is level-headed Amelia who finds herself caught up in his tangled affairs.