See more ideas about cover, book cover design, book cover. You may notice, for example, that a ton of horror novels. If you can afford it in terms of design and space available, you can incorporate the barcode, which is a very functional element, into the back cover design. In other words, it should be far more condensed than the author bio that appears on the last few pages of your book or in the “about the author” section of your website.two to three brief sentences will do (25 to 50 words max). Book on mindful sexuality for men.