It is extremely important to me that the cover is legible and readable in a grayscale format and in a small thumbnail, as I am primarily promoting this book on Amazon via Amazon ads.
My initial design idea was to include something with a beach, like the 4-hour workweek, to symbolize how people will be able to enjoy working less if they read this book and apply the lessons within. I have a preference for designs like this -- designs that emphasize an enjoyable lifestyle, designs that will convince the reader to read this book based on how it will enhance their life.