Hm, is it weird that this is the only subgenre where I actively root for the emotional connection? Not the Stockholm syndrome justification, but the genuine, messed-up intimacy that forms in extreme isolation. 'Captive in the Dark' by CJ Roberts is the obvious, brutal starting point. It doesn't sugarcoat the horror, which makes the fragile, dependent bond that develops feel dangerously real. The power imbalance is the entire point, and the tension comes from watching two broken people navigate a relationship that's toxic by any normal standard.
For a paranormal twist, Amelia Hutchins' 'Fae's Captive' series flips the script. The captive human and the fae king are bound by a deeper magic, which forces a proximity that reveals layers beyond just predator and prey. The 'bond' is literal, a magical tether, allowing the emotional one to feel almost like a discovery. It's less about justifying a crime and more about exploring a fated connection within a forced scenario. These books work because the emotional bond isn't presented as healthy; it's presented as inevitable, and that's where the dark fantasy reader's curiosity lies.