If your book isn’t selling well, or hasn’t sold ever, consider refreshing your book design. If you are not receiving the results you were looking for, this may be one of the simplest way to help your book commerce.
Humans are visual and even though we try hard not to be influenced by visuals, most of the time we make decisions based on aesthetics.
Don’t get pre-made book cover art, go for something original.
Let your ebook cover designer know what is it that you have in mind and provide an example of how you would like the cover art ideally to look like.
Once you get a couple of options, you can run a poll among friends, coworkers, and acquaintances to choose which will be the way to go.