Preferred File Type: PDF file where the pages are organized as follows:
If you have separate files for the Front cover (either single side or double side) and for the Back cover (either single side or double side) you can upload them separately.
Otherwise one file including one page after the other (first page is the
For One Side Printing: One side (page) per page in the file. In other words, do not upload spreads (that is when you have, as an example, pages 1 and 4 of the book, as part of the same digital page)
For Double Side Printing: Even if some sheets get left blank intentionally, your file should include those blank pages and sheets.
Upload Preview: You should be able to get a preview. Let us know if you need further help.