We are a children's charity group of writers/editors and designers -- mainly in the USA -- who bring out two books a year, usually in the Spring & late fall/ Christmas time. This picture is one I took in Germany and is used in my story DracoDreaming, which is in our book Faeries, Pixies and Dragons, oh my!
As we are a charity, all monies got to various children's charities. We get our payment hoping our words can ease the pain of a child in distress.
The story of DracoDreaming was to be one in a series of dragon stories.I hoped to bring out for children. However, nobody is interested enough to buy the first book in the series -- Drakanarc http://www.amazon.com/dp/B00KXHGSZ6 -- so, I won't bother with the rest.
Another genre to avoid.
I guess writing for a children's charity doesn't permit me to consider myself a children's author. My other children's e-book Johnny Cooper's holiday http://www.amazon.com/dp/B00K2AYMQ6 suffered the same fate. People enjoy the story on line, but can't spare a few nickels to help a struggling writer keep his faith in his work.
Along with Noire/sex/erotica/ romance and crime, here is one more area to avoid.
I haven't tried a true Western yet, my Amazon best seller Holding Richmond http://www.amazon.com/dp/B007CJKK84 is more a vampire crossover with an alternate history theme than a western. I did try a teen romance http://www.amazon.com/dp/B00II8OKBQ but that failed too.