I think most readers would be surprised by the amount of research that goes into writing a novel. I spent 2 hours last Friday hearing tales of fights, for a half page scene.
The weekend prior I spent hours virtually house hunting. I needed to find houses where my fictional burglaries would occur, where Rose and other characters lived.
Sunday I read articles on gutting fish. Topping it off with watching video. That is, to date, the grossest thing I’ve done for research.