Castle Terror — Marion Zimmer Bradley

ISLE OF HEARTBREAK

Susan Moore had a lesson to learn: Flee from a hopeless romance, and you may find yourself a pawn in an even more dangerous and tragic game of love.

The castle on Sanctuary Island, to which Susan's mysterious nursing assignment took her, had been built for love. But it had become an embattled fortress of hate - hate that festered and grew, and held only peril for anyone who tried to probe its secrets.

But Susan no longer had a choice. She had to discover the greatest secret of all - the ultimate seed of those swirling hatreds - or kiss happiness and sunshine good-bye forever. If she succeeded, there would be a new love that would elevate her to paradise. If she failed, she was doomed."