In this article on BOOKish, Editor and now Author Chris Pavone shares 7 Things Being an Editor Taught Me About Being an Author, and it's well-worth reading.
I particularly liked the statistic that even if your book is the single best-selling novel of the year, maybe 2% of Americans will read it. Which, of course, means that 98% won't. Leading Chris to say,
"There's no way to appeal to everyone, and no reason to try: It will only ensure that a book appeals to absolutely no one whatsoever."
Check out the rest of the piece, and
Illustrate and Write On,