The fast pacing and action set pieces of his books attracted the attention of Hollywood. In 1971 The Andromeda Strain, the first book written under his real name, became a feature length film. However, it wasn't until the 1990s that Crichton became a household name and synonymous with box office success. Between 1990 and 2000, seven of his books were turned into movies that grossed a total of almost $2 billion worldwide. The first two Jurassic Park movies were the most successful of the adaptations, ranking not only as some of the highest grossing movies of all time, but also inspiring a generation of children to learn more about paleontology and genetics. He also created and produced the television show ER and wrote the screenplay for the movies Westworld and Twister. In 1994, Crichton hit the trifecta; writing the most widely read book, the most watched TV show and the highest grossing movie.