Word doesn't do this directly although it can save the document to PDF easily enough.

When it comes to having a PDF that needs to be produced as a booklet, you need to specify if this is for viewing electronically or actually printing double sided. The facing page pairs are very different for this. For instance, viewing the booklet on screen you would expect to see the cover as the first page whereas in a printable booklet, the back page sits to the left of the cover on the first page.

__________________
Andrew Lockton
Chrysalis Design, Melbourne Australia