You almost certainly have the site set to A4 sizing with broad margins. But before you self-publish, All those webpages need to be converted into a appropriate for a book structure. Will you be composing a children’s book? Or maybe a fantasy book that has a map of its entire https://maplepublishers.com/blog/what-support-you-can-avail-of-from-maple-publishing-when-self-publishing-a-book/