Michael Crichton approached the concept of Westworld from a movie-first perspective. "[Westworld] didn’t work as a novel, and I think the reason for that is the rather special structure of this particular story. It’s about an amusement park built to represent three different sorts of worlds: a Western world, a Medieval world and a Roman world. The actual detailing of these three worlds—and also the kinds of fantasies that people experienced in them—were movie fantasies, and because they were mov