The back cover offers a synopsis and information in regards to the creator that relate to the book. Book cover by kostis Pavlov for celenawittman. The back cover also needs to leave space for your Global Conventional Book Number (or ISBN code) and the barcode that goes with it. It https://kindledirectpublishing.fashion.blog/2024/09/28/creating-a-masterpiece-for-readers-through-the-art-of-book-formatting-and-layout/