Shades of Familiar
The ghost and Mrs. Muir?

Though Mary Muir had once dreamed of becoming William McEachern's bride, after their unexpected reunion she found his abrupt proposal of marriage surprising. And when her long-lost love insisted on a hasty wedding, she felt slightly apprehensive.

But once inside his fairy-tale Scottish castle, Mary saw her dreams of wedded bliss turn nightmarish, as her attentive fiance was transformed into an unbridled stranger.

Was William possessed by the spirit of a savage ancestor -- or were other, more worldly demons the cause of his bizarre behavior? With the help of a solitary assistant -- Familiar, the feline detective -- would Mary discover the truth in time to save her beloved?