The book was written in such a way that it wouldn't have made a good movie. Yes, they changed and left out a bunch of content to make the movie as good as it was, but if they hadn't then half the movie would have been about genetics and the science behind actually making a dinosaur. The book was much more detailed and in-depth than the movie could have ever been, not just on the science but on the workings of the park itself.
The movie was a better action/adventure story. The book was a better science fiction story.
And the fucking raptors man. In the book the tried to fucking hitchhike their way of the goddamn island. They moved all their fucking eggs onto a boat and then just hid their waiting for it to leave.
And pic related, it's a raptor that can fucking read. It'll relentlessly hunt you down and try to befriend you, fucking christ that's terrifying.