As adults, when we read nonfiction, we are reading for a purpose. I pick up an article about the 13 colonies because I need to learn what the major settlements were for my lesson. Or I find an article about what coarcation of the aorta is so that I am better prepared when I visit the cardiologist for treatment discussions. I don't just pick up a nonfiction article to read for the fun of it. I always have a purpose.