Everyone has listened to the phrase, “Don’t judge a book by its cover”, but let’s be honest, everyone buys a book to read by seeing its cover. No one buys a book without a recommendation by seeing just that. The truth is that books with good graphics and high-quality covers that catch people’s attention boast significantly higher sales than other books. It is a simple fact. It is important for both fiction and nonfiction book writing. Some people have been saying that cover design is on the decline, but despite these opinions, cover design is not on the decline. In fact, the cover design market is currently developing significantly, and there are even awards just for cover design. From long ago, the perception that the cover design came out of the book’s author’s liking, despite spending a lot of time, was dominant. However, with the advent of the digital generation, these perceptions gradually change due to the emergence of ebooks that authors can self-publish at the same time as writing, and crowdsourcing (a method of involving the public in the production of products or creations). It has been.