This is really interesting. Of course, I'm glad the childrens's are doing better.
The survey has kicked into high gear and the results thus far are:
science fiction/fantasy: 62
advice how-to: 54
In hind sight, the categories of fiction and non-fiction are just too broad for this survey. Those categories have limited the results in my opinion .
Still, 558 responses is a very statistically significant sample to draw conclusions from.
I'll do one more day (Wednesday) and take the survey down.
Man! 558 possible sales of one of my books! Ah, the cost of proper information!
Hope this is helping someone, somewhere.