I remember reading this when I was still living in Stockton, so probably somewhere in that window around when the movie came out in 1993 in the months before we moved to Lodi. At the time, I wasn't allowed to watch the movie or read the Crichton novel (my first Crichton novel would be probably around 94-96 with Sphere), so getting my hands on the junior novelization was the next best thing. I had a few of the toys, but I think other than this book, my most prized JP possession was probably the Topps Jurassic Park Official Souvenir Magazine (I also had some of the Topps comics -- I think my dad bought a few to open and a few to keep sealed which...I doubt have ever appreciated much in value since the art in them was uniformly terrible).
I cracked this open to read with Enzo and it definitely feels a bit too mature for an advanced 4yo. It definitely pulls back on the violence of the four prominent character deaths, but three of them are still depicted enough that I skirted them quickly in my reading. It follows most of the major plot beats of the movie, adding in a few weird elements -- explaining away the sick triceratops with the gizzard stones that get a later mention when Alan discovers the eggs and realizes the dinosaurs are in fact undergoing environmentally-stimulated sex changes. The other are some longer exchanges that Alan has with Lex and Tim, namely one moment where he starts waxing to himself, aloud, about how likely they are to be attacked again by the T-Rex, driving the kids back into the safety of the drainpipe within the T-Rex paddock. I'm curious how many of these elements came from the novel or were from original script ideas that didn't make it into the film (I think the gizzard stones might have been both, but I don't recall this particular exchange with Alan and the kids in the books).
There are also some choice line replacements -- Ian still gets most of his important ones, but a lot of the comedy is bled out of this translation. Alan seems to really hate kids. Arnold can't mention butts, or the holding of them. Maybe most prominently missing are "stick! stick, stupid!" and "clever girl..." Also an odd assortment of pictures in the not-quite middle of this edition -- unlisted characters (but not all of them, sorry Sam Jackson!), nothing of the dilophosaurus, and two images of the raptors that are very poorly lit.
I'm glad these things exist, but outside of a fairly narrow age range, I'm just not sure who would read these.