I have been blessed to be called a gifted writer. In fact my book has been rated a five-star masterpiece. I have been called an artistic genius. I do not know how to market in the first place. So no one knows about the book except the few people who marvel at the work of a first time author. That's me. Can you help?
But in today's world, how much "selling or marketing" is that author also expected to do while still trying to write the next book.
These are indeed sticking points that a lot of authors face, and, until you become that "mega-author" when you have A) a ton of cash coming in so you can quit your day job; and B) have a staff of people working for you so you can focus on your writing, you will have to find a way to do this on your own.
In simple terms, marketing is simply about name recognition. The more people remember your name, the more they start to equate the quality of your books to your name. In other words, the mind starts thinking, "Hmmmm? This product must be OK since I am seeing the name a lot." We know this works too. Political campaigns have people voting simply because the remember the name of a person and not so much about the issues the person was pushing. Here's one a little closer to home. My kids kindergarten class actually did an activity (an early reading activity understanding symbols mean something) that had the kids naming businesses based on their symbols.