It is highly likely you are referring to her work within the Gods and Monsters series, which features a "Phantom" figure or captive storyline, or perhaps confusing it with the Tattered Curtain Series (Greer Rivers) or the H.D. Carlton Phantom book.
Analyze how King structures the relationship between Lissa/Valissa and Prince Poison. The dynamic relies on fear, coercion, and forced proximity, which are central to the dark romance genre. Phantom by Klarissa King
Briefly outline the premise of Captive (Gods and Monsters #2) . State the thesis regarding power dynamics. It is highly likely you are referring to
Compare King’s style to other dark romance, focusing on the psychological elements rather than purely physical violence. Conclusion: Summarize the arguments. and forced proximity