Pandering to popular themes can backfire - though you assume you're drawing closer to an audience there is actually a severing that eventually takes place i.e. when your time is up. Let me elaborate - I'm a frequenter of used bookstore - I love old 80's ya series which I collect and a couple of years ago the bookstore owner allowed me to fill a boxes for ten dollars a peice -from the ya section - but only the stuff she considered dated. All the 80's series. Although I was ecstatic, I kept thinking as soon as the shelves are clear all these books will be as forgotten about as Vicki Barr ( a crime solving flight stewardess - who had an uncanny resemblance to Nancy Drew. ) I guess a writer has to ask themselves , am I okay with being a writer who follows a trend and could wind up after a few dusty years in an used bookstore - weeded out and forgotten about - ( except by crazy collectors. ) Or do I want to be a trailblazer.