Castle of Dark Shadows (Gothic Historical Romances #2)
Patty G. Henderson

Olivia could not have guessed the dangers that awaited her in the exotic but darkly menacing castle. When there is an accident on the road to Dunraven, she wonders: Are the broken carriage wheels mere random misfortune or a sign foretelling doom? Olivia's fears soon turn to mortal terror after a subsequent encounter with a terrifying faceless phantom disabuses her of the 'random misfortune' theory. Frightened but undaunted, she decides to put the nightmare behind her and throw herself into cataloging the enormous Dunraven library.
What Olivia could not have foreseen was the devastatingly beautiful Marion Dunraven's effect on her heart. But the madness that seemed to curse the rest of the Dunraven family makes Olivia realize she must find a way to escape Dunraven Castle with her life and the woman she loves before they both become victims.