In some cases, numbers appeared on both the recto and verso pages, but other times, only one side of the page bore a number. Use of numbering was sparse.

Place page numbers on landscape-oriented pages you've reduced to 5.5 by 8.5 inches, and then print two pages per sheet.

As part of upcoming update to the Kindle, Amazon is adding "real" page numbers to e-books along with a few other new features.