Have you ever wondered why some books sell a lot, and may even be turned into films while others don’t? Well, it all depends on what the author chooses to write about and how he or she writes the story.
Most universal themes sell a lot. However, what you should realise as a budding writer is that we are living at a time in history when most universal subjects have been rendered. Think of themes like love, corruption, calamities; surely, someone has written something about them. Then how or what should a budding writer focus on?