Look, I think there should be way more slasher movie novelizations with wildly overreaching backstories, so that's the main reason to read this, and it succeeds at that. The problem ultimately is that the plot of the movie doesn't provide space to pay off all of these wild threads of revenge, Satanism and cycles of child abuse.

I am curious how much of the material that actually was in the movie that's lost here was later additions that weren't in the screenplay Koontz was provided and how much he just wrote himself into a corner with his additions that would require too much explanation to fit, so he just dropped the movie version of events.

It certainly provided me with what I wanted from it.