Why are there are more women in book clubs than men?

To begin an answer, we need to consider an associated question: Are men more complicated than women?

Four types of mystery stories exist. They are (1) hard-boiled mystery, (2) cozy mystery, (3) police procedural, and (4) adventure mystery.

Rather than reinvent previous analysis, go to the website of Misa Ramirez, which clearly and succinctly describes these four (see http://misaramirez.com/for-writers/types-of-mysteries/ ).

I grew up in Asheville, NC. In the summer, I would read in a rocker in a sunroom on the side of the house. Some relative had left the Rex Stout/Nero Wolfe novels in the hip-high bookcases around the room.  One of my favorite writers! Rex Stout and his fantastic Nero Wolfe series don't seem to be talked about much these days, but they were early favorites of mine.