Does digital reader work?

Ive been trying for 2 days to sign up and install adobe digital reader so I can read ebooks on my mac 10.6.8.  I get a message that there's no application to read the book I downloaded yesterday.   I can;t tell whether the digital readers have been downloaded or not, or whether they work in the first place.  Does the digital reader allow me to download books on my Mac?  How can I tell it it works or not?  I got no informtion from adobe at all they just want  to keep viewing my (overcomplicated) password--over & over & over.  Live chat refused to help although I waited in line almost 2 hrs.