Jurassic Park is arguably the most famous of Michael Crichton's novels, and it is a reflection of the authors expertise as well as his interests. Crichton started as an English major at Harvard but switched his major. He graduated with a degree in anthropology, which is the study of man, over time, "that draws and builds upon knowledge from social and biological sciences, as well as the humanities and the natural sciences."
Crichton continued to write, and his subject matter for Jurassic Park is a direct reflection of his college studies. The novel is a reflection of history (dinosaurs), natural and biological sciences (fossils, DNA, and more), as well as human nature (the romanticized desire to create something from nothing and to create one of the most fascinating creatures of all time, dinosaurs).
Crichton is often credited as being the creator of the modern "techno-thriller," and this novel fits that category. He also uses his writing to make social commentary, which Jurassic Park does. Note the following:
“Let's be clear. The planet is not in jeopardy. We are in jeopardy. We haven't got the power to destroy the planet--or to save it. But we might have the power to save ourselves.”
“God creates dinosaurs, God kills dinosaurs, God creates man, man kills God, man brings back dinosaurs.”
“Discovery is always rape of the natural world. Always.”
In all, this novel is an apt reflection of Crichton's knowledge (studies) as well as his point of view, that man manipulates nature at his own peril.