Of all the several areas of a book cover, That is arguably A very powerful. Go with a Picture, graphic, illustration—or make a statement with a plain color—which will entice your target market. It wants to speak just what the book is about whilst drawing as part of your reader. https://www.reddit.com/user/SelfAmazonKindle/comments/1fr8op4/creating_a_masterpiece_for_readers_through_the/