Secrets of the Highwayman by Sara Mackenzie

Melanie Jones thought she was imagining things. Surely there’s not a breathtaking man astride a magnificent black horse racing her sports car on a country road. And he has the nerve to wink at her, just before he vanishes into the night! When he appears to her in solid, sinewy muscle, Melanie realizes he’s real . . . and irresistible.
Nearly two centuries ago, Nathaniel Raven was betrayed and murdered by a trusted friend. He now has one opportunity to uncover the secrets of that night, and Melanie is the only woman who can help him. She may be the most infuriating and independent woman he’s ever known, but there is no denying the burning passion between them . . . or the lethal danger that has followed him from the past . . .