In addition to the EPUB 3 requirements defined in Structure of a Version 3 EPUB and EPUB 3 Features, the guidelines in this section are specific to fixed-layout books.
A fixed-layout book must have pre-paginated in the <meta property="rendition:layout"> tag in the <metadata> element within the OPF file. See Defining Book Layout Metadata for more information.
The landmarks navigation structure is required for fixed-layout books only if you do not provide a custom sample. Apple Books references the landmarks when generating the sample. It allows Apple Books to determine where the main content of the book starts (see Landmarks).