The Parasite by Arthur Conan Doyle

A young man becomes the subject of a psychic woman’s experiments and gradually finds himself under her eerie mental control. As she manipulates his thoughts, feelings, and actions, he begins to lose his grip on reality and autonomy. The tale unfolds as a chilling battle of wills and identity. Themes of obsession, power, and unseen influence run throughout. It’s a cerebral and atmospheric thriller with a strong psychological bent.