The novelization of 'Jaws 3' is one of those rare cases where the book actually came after the movie, which is already a fun twist. Usually, it's the other way around! The novel was written by Hank Searls, based on the screenplay by Richard Matheson and Carl Gottlieb. While the core plot stays the same—a giant shark wreaking havoc in SeaWorld—there are some interesting deviations. The book fleshes out characters way more, especially the protagonist, Mike Brody, who feels more layered with his backstory and internal struggles. The movie rushes through some of those emotional beats, prioritizing action scenes (which, hey, it's a 'Jaws' movie—fair enough).
One major difference is the shark's origin. The novel suggests it might be a mutant, a result of nuclear testing, while the film keeps it more straightforward: just a really big, angry great white. The book also has this eerie, almost psychological horror vibe at times, like when characters hallucinate or have nightmares about the shark. The movie, though, is pure spectacle—tense, but more about the jump scares and underwater chases. Honestly, if you enjoyed the film, the novel adds some cool depth, but if you're just here for the shark attacks, the movie delivers that perfectly fine.