Booklets are documents which consists of multiple pages and arranged on a sheet of paper which, when folded, shows the correct order of the page. You can print a multi-page document as a booklet. For booklet printing, your printer must support either manual or automatic duplex printing, i.e. printing on both the sides of paper.
It can be printed with the help of Reader or Acrobat. Reader or Acrobat lays out the pages-two per sheet. When you fold and staple the sheets which are double-sided, the result will be a single book with the correct order of each page.