The Return of Lord Rivenhall — Fenella Miller

Amelia Rivenhall is delighted when Richard arrives to claim the title left vacant by the sudden death of her father eighteen months previously. But when William also turns up, claiming that Richard is an impostor and that he is the real Lord Rivenhall, her troubles are just beginning. She discovers that when a huge inheritance is at stake, impostors and rogues will try anything to claim their money...