As you know, judging a book by its cover is supposed to be wrong, but we all do it... so will your potential readers.
If your cover does not grab potential customers and pull them in, then it's ineffective. My design process starts with your vision. You know what you want...you know your audience...my primary goal is to capture and enhance what you envision.
Print work is a whole different ball game to web design. It's easy to make mistakes on print jobs if you're not aware of the pitfalls. And with so many different options available these days it's worth using a design firm that knows the difference between RGB and CMYK.
When you're ready, let me bring your book cover to life.