Some of the ebooks are PDF files, which means you need Abobe Acrobat Reader in order to view them.
Chances are good that you already have it installed on your computer. However, if you do not have Adobe Acrobat Reader,
you can download it here for free: Download Adobe Acrobat Reader
win rar reminder : 7-zip
You will also need a Zip program to unpackage the files.
You probably already have one
installed on your PC, but if not you can get a free one at Download 7-zip