E-books that didn't have an ending but always showed the last page usually referred to the format of novels or certain documents. In this format, the content of each page was different, but the entire document did not have a real ending. Therefore, the reader could keep switching pages until they reached the end of the document. E-books in this format were usually used for novels, comics, documents, etc. It was convenient for readers to read and could also increase the variety of documents.