Steven Spielberg’s 1993 movie Jurassic Park was groundbreaking, with its best characters remaining icons today. That said, the movie and its sequel, The Lost World, were based on books by Michael Crichton, and many of the Jurassic Park and The Lost World book characters are extremely different from their movie counterparts. Michael Crichton’s Jurassic Park was more of a science-fiction genre novel, leaning heavily into the chaos theory explanation, but the movie added several major action scenes. The Jurassic Park movie’s most powerful dinosaurs were not always the same as in the books, and many characters changed significantly.