This is a really interesting read! I think the point about rich people choosing books about self-improvement, education, and success is particularly thought provoking.
I’m an avid reader. I probably read at least one book every one to two weeks, and it’s a mix of “rich people” types and “poor people” types. Sometimes, I read a book about branding or blogging to guide me through decisions I make at work or where I want to go/what I want to do with my career. Other times, I read novels for entertainment (yep, totally a YA junkie, I’ll admit it).
I think reading a mix is more helpful to me than choosing one over the other. The “rich people” books help me with real life, and the “poor people” books help me relax and live someone else’s life for a little while. But the thing you (or whoever did the studies)are missing here is that reading those YA novels and fictional stories helps me become a better writer, a better problem solver, and a more creative person, which all, in turn, help me be more successful in my industry (marketing/communications).