As you could possibly expect, it's a elementary A part of the publishing system: a book cannot be revealed if it does not have a book cover. Perhaps far more importantly, it normally will not likely manage to appeal to viewers if it does not have a fantastic book cover. https://whitemagicstudios.co.uk/blog/why-is-an-indie-publisher-or-a-self-publisher-ineluctable-for-a-rising-author/