The simple romance story has been around for a while, dating back to back to the 16th century, when William Shakespeare wrote the famous story of star-crossed lovers: Romeo and Juliet. Now that may be a play, not a "young adult fiction novel, but it is literature nonetheless. romeo an Juliet is the classic tale of star crossed lovers, copied hundreds, maybe even thousands, of times in history. What happens is we see story we like, but there is a detail that we think isn't quite right, so we rewrite the story to our own liking. This seems to be a common theme: copying old works and making them new and fresh. For example, Disney put lions into centuries-old Hamlet and made a blockbuster hit: the Lion King. That's all writing is, I believe, is taking old stories and tailoring them to fit our beliefs. Another fine example of how history repeats itself.
The other type of writing in YAF has been around much longer than romance. Dating back to 700 BC, the epic poems Iliad and Odyssey of Ancient Greece tell similar stories to those we see today. "Unsuspecting Hero saves the world" is very popular, almost as popular as the story of the underdog, Cinderella, or the dark horse. We saw it in Ancient Greece and we see t now, as recently as in 2011 when the Harry Potter "Era" came to an end. But there's one thing: the era is not over. Believe it or not, there will be another Harry Potter, because there always is. He might not be the unsuspecting boy-wizard in glasses with the lighting bolt scar, but he (or she) will have their own attribute that make them special and lovable. We will have more heroes to look forward to until readers stop reading and writers stop writing.