Fixed-layout books are like flowing books, but with the following additions:
Apple Books 3.0 or later supports EPUB 3 fixed-layout books. Using EPUB 3, you have the choice of creating a single spread using one or two content documents. By default, a book with two documents per spread maintains the book-like appearance including the book spine, pages, and page curl. By default, a book with a single document per spread does not include the book-like appearance and instead the spread looks like a single sheet, similar to the PDF view.
In fixed-layout books that have two documents per spread, the first page of a left-to-right paginated book (for example, English) will be on the right side of the spread. In a right-to-left paginated book (for example, Japanese), the first page of content will be on the left page of the spread. Generally, this first page is the cover page.
A fixed-layout book must have the height and width of the book defined in a <meta> tag in the head of each XHTML document. For example, <meta name="viewport" content="width=600, height=1000" />. Apple Books uses these dimensions to determine the aspect ratio of the book. These dimensions must be consistent and must match the dimensions of the <body> tag.