Just because there are little green men following you around, does not mean that you are not paranoid. (Note: It doesn't mean that you are, either.)

I had to follow the link to find out that OCR is an acronym for the 'Office of Civil Rights'. Now you know too.

Both FBReader and Calibre work well for both Android and Windows devices, and both are free. Calibre is more full featured but is correspondingly more complicated to use. It is good for managing your library as well as reading. Calibre is open source, FBReader is closed source I recommend both.