Who Walks by Moonlight? — Marjorie McEvoy

Twice someone had tried to kill her, but Gisella could not leave Castle Wiederbeck as long as the man she adored was blind to the disaster that threatened him--blinded by love for another woman...

Haunted House...

To live in a castle while studying music with one of the finest teachers in Europe was ad ream come true for talented young pianist Gisella Bergman. She felt like a princess in a fairy tale. But the story had a sinister subplot. The castle--in fact, the very tower where Gisella's room was--was rumored to be haunted, and she hadn't spent many nights there before she began to believe the rumors were true. But this didn't frighten her so much as the evil she sensed in Theresa, the wife of Count Karl Barritza whose mother, the dowager countess, was Gisella's sponsor. Never had Gisella seen a man so much in love as Karl ... a love she was sure his wife did not return. Sternly she told herself it was none of her concern, denying her own growing attachment to the handsome young count. And then the "ghost" of Schloss Wiederbeck walked again and made it very much her concern when it tried to take her life . . .

For a gawky Welsh chit of eighteen, the chance to practice and perfect her piano playing in a fair-tale castle high above the Danube, supported by a kindly sponsor, was a dream come true. And the Count who was to be her tutor and instructor was indeed a romantic figure who might well have emerged from such a dream.

Yet even in fairy-land all was not ideal, as other more sinister figures intruded on the scene and threatened to make a Purgatory out of Paradise.

Terror...
There seemed to be no means of opening the secret panel. Nothing broke the blank stone surface except a small carved panel of wood. It was ugly, depicting an ogre, mouth open in a diabolical grin.
Something impelled me to reach up. My fingers curled into the yawning mouth. There was a click and the panel moved slowly to one side, revealing a cell and steps leading downward.
My elation was short-lived. I stepped inside and my eyes were still adjusting to the dark when I heard the click again. Turning in panic, I found the panel closed tight.
Someone--or something--had made me a prisoner in the haunted turret.

Hero: Count Karl Barritza
Heroine: Gisella Bergman