The Intervening Lady (1914)

Set in early 20th-century London, the novel revolves around Francis Markrute, a wealthy businessman entangled in a strained engagement with Lady Mary. His life takes a dramatic turn when he meets the enigmatic Madame Selarne, who captivates him and ignites a dangerous obsession. As his feelings for her intensify, Lady Mary grows suspicious and hires a detective to unveil Madame Selarne's secrets, leading to revelations of deceit and betrayal. The story delves into themes of love, desire, and the repercussions of one's choices.