The most effective portrayals I've encountered are those that treat the obsession as an internal logic, not just a plot device. In Ruth Ware's 'One by One,' the corporate spy's fixation isn't just about the money; it's rooted in a perceived injustice and a warped sense of reclaiming what's theirs. The narrative spends time in their head, showing how every intercepted email and observed meeting is a piece of a puzzle only they can see. It's less about 'I want you' and more about 'I understand you, and therefore you belong within my narrative.'
What often gets lost in cheaper thrillers is the stalker's profound boredom or loneliness. A character like Joe from 'You' works because his monologues reveal a hollow person trying to fill himself with the curated identity of another. His obsession is a project, a full-time job that gives structure to an otherwise empty life. The books show him researching, planning, building a false sense of intimacy through digital breadcrumbs. It's terrifying because it mirrors how we all construct understanding from social media fragments, just pushed to a pathological extreme.
The mindset is frequently one of ownership disguised as devotion. They don't just desire the person; they believe they have a superior claim to that person's story, feelings, and future. A lesser-known example is in Tana French's 'The Likeness,' where the obsession is with a crafted identity, a performance. The stalker's violation feels like a critic dissecting a bad actor, which is a uniquely chilling angle.