From @BayView's link in a different thread: http://mashable.com/2012/08/26/reading-stats-infographic/ Keep in mind also this is from eBook analyses but I think that is where the market is going. While it bother's me Amazon spies on whether or not I finish a novel, I can't say the data gathered isn't useful. That's good to know. It also turns out men buy more books with male protagonists but currently books with female protagonists are more likely to be best sellers. Analyzing the market matters if sales are important to you. I don't mean one needs to join the copycat market with shiny vampires and female warriors. But once your book is written, it helps to know the market to know how to reach those readers.