Zofloya by Charlotte Dacre

This gothic novel is not as compelling as The Monk; the plot comes together too quickly--which is to say, it starts with the destruction of a family of four, narrows its focus to the sister, and then brings the brother back in halfheartedly at the very end. Indeed, the book becomes more interesting for its flaws than for its successes. Although there's a seduction by the devil, the bargain is never explicitly Faustian--and the devil, Zofloya, isn't introduced until Victoria is already well on her way to wickedness.