Lulu xPress prints books from two files: a single multi-page PDF for your interior and a single-page PDF for your cover. Our system creates your book based on the file you provide for the interior. The page size and page count are based on the PDF you upload for the interior. For example, if you upload a PDF with 200 pages sized 6" x 9", our system will detect those values and create a US Trade 6" x 9" book with 200 pages. Be sure to include any header and footer content, such as page numbering, in your file as well. Use our prepared templates to help ensure your files are print ready. You can use this detailed PDF Creation Guide to prepare your PDF.