How many copies of the novel Jurassic Park were sold when it was released in 1990?

When "Jurassic Park" was released in 1990, it sold over 1 million copies within a matter of weeks. The novel's popularity was significantly boosted by its engaging storyline and the subsequent film adaptation directed by Steven Spielberg, which further propelled its sales. Overall, it became one of Michael Crichton's best-selling works, contributing to his status as a prominent author in the Science Fiction genre.