Are you sure? Maybe I’m mistaken but I read the first one recently and there were two t-rexes, one adult and one juvenile. Oooh, wait, is there an actual baby t-rex in the second and not like a kid one? I only saw the first and third movie so I don’t know

My first thought as well. I think the smaller scale of the movie also really helps contain it, like having only 3 raptors makes them more consequential than the 11 or so they dispatch in like one chapter. Although I miss the Baby T-rex in the movie. Overall, Crichton is really good at the science aspect and the theme of chaos theory, but the movie treats every character better. Like Grant is way more interesting in the movie imo