As you may hope, it's a essential A part of the publishing approach: a book can't be posted if it doesn't have a book cover. Probably extra importantly, it often is not going to be capable to bring in readers if it does not have a very good book cover. https://whitemagicstudios.co.uk/blog/why-best-seller-books-have-a-book-trailer-and-why-you-should-too/