Welcome to MobileRead, Greg.
First off, which authors are you looking for? They may be available cheaper elsewhere.
Ebay isn't always the best choice.....I"m not sure why the pages are coming up blank..
Calibre is free, developed by our own kovid goyal, and here is the link. there is even a short video highlighting exactly how to install. Try it.........you'll wonder how you ever did without it. Keeps your books wonderfully organized on your computer.
http://calibre-ebook.com/