Yes, Michael Crichton wrote several works related to the Jurassic Park franchise. His two main novels are:
- Jurassic Park (1990) - The original novel that introduces the concept of cloning dinosaurs and the chaos that ensues.
- The Lost World (1995) - The sequel to Jurassic Park, which follows new characters and some returning ones as they explore another island populated by dinosaurs.
These are the primary novels by Crichton set in the Jurassic Park universe. After Crichton's passing, additional books and media in the Jurassic Park franchise have been created, but these two are the main works authored by him.