Hammond doesn't appear in the second book (though he does in the second movie). This is because, in the book series, Hammond was killed in the first book. He slipped, broke his ankle and was fatally attacked by compys.

Several of the scenes from the first two movies are mixed from the books.

The T-Rex gets off the ship in San Diego. But the street seen is San Fernando Road in Burbank, about 130 miles north of San Diego.

In the book, the character Nick does not exist. Instead, there is a genius professor that is constantly going into battles of intelligence with Ian Malcolm. Also in the book, Kelly has absolutely no relation with Ian at all, Sarah is the last to get to the island (unknowingly with the bad guys), the professor is the reason they go to the island, and, as far as I can remember, Hammond doesn't make any appearance in the book.

In the final scene when the little girl is watching the news, when it first shows the TV you can see the reflection of four people on the couch and one of them is Steven Spielberg.

Does anyone recognize the guy who was eaten by the T-Rex in San Diego? It was the screenwriter of Jurassic Park and The Lost World, David Koepp.

About the book really, but it sort of relates - in the book of Lost World, Malcolm is a main character (like in the film), despite the fact that he dies at the end of Jurassic Park, the book. It's semi-explained away at the beginning when he's giving a speech and says something like "rumours of my death are greatly exaggerated", but even so - at a guess Jeff Goldblum had already signed up for a sequel...

The T-rex that attacks Jeff Goldblum in the trailer was actually attached to the ground, so the sets were moved around it.

The scene where the trailer falls over the cliff was filmed using a multi-storey carpark.