One Dean Koontz book isn’t a great sample size. He writes a LOT and most of it isn’t very good, but every once in a while he gets it just right and puts out a really good one.

Though tbf, I haven’t re-read his stuff in probably 10 years so I don’t know if it holds up to modern scrutiny. Odd Thomas was always my favorite of his.

If Draino works for you, great. But in case anyone is reading this and has an experience like mine where Draino never seems to fix clogs for long, especially in showers/bathtubs: try Green Gobbler. It’s non-caustic, so easier on your pipes, and it breaks down clogs using enzymes to break up organic material. In my experience it’s much more effective than Draino.