A long fatal love chase / Louisa May Alcott.

Enhanced descriptions from Syndetics:

"I'd gladly sell my soul to Satan for a year of freedom," cries impetuous Rosamond Vivian to her callous grandfather. Then, one stormy night, a brooding stranger appears in her remote island home, ready to take Rosamond to her word. Spellbound by the mysterious Philip Tempest, Rosamond is seduced with promises of love and freedom, then spirited away on Tempest's sumptuous yacht. But she soon finds herself trapped in a web of intrigue, cruelty, and deceit. Desperate to escape, she flees to Italy, France, and Germany, from Parisian garret to mental asylum, from convent to chateau, as Tempest stalks every step of the fiery beauty who has become his obsession.

A story of dark love and passionate obsession that was considered "too sensational" to be published in the authors lifetime, A Long Fatal Love Chase was written for magazine serialization in 1866, two years before the publication of Little Women . Buried among Louisa May Alcott's papers for more than a century, its publication is a literary landmark--a novel that is bold, timeless, and mesmerizing."