There is several free software available online that can help you make a pdf file. The one I like to use is PrimoPdf (you can download it at http://www.primopdf.com/).
Once you downloaded the software, all you have to do to create a pdf file from your document is click “print” and choose as “PrimoPdf” as printer in the printer dialog box.
This video will show you in detail how it’s done.



thanks for this sofwtare! still learn, i only can make a pdf site but haven’t yet for its book