The novel begun as Crichton conceived a screenplay about a graduate student who recreates a dinosaur in 1983. Eventually, given his reasoning that genetic research is expensive and "there is no pressing need to create a dinosaur", Crichton concluded that it would emerge from a "desire to entertain", leading to a wildlife park of extinct animals. Originally it was told from the point of view of a child, but Crichton changed it as everyone who read the draft felt it would be better if told by an adult.