I am using Freda to read ePub books. It allows me to browse for books and is a good reader.
I don't think Liberty Book Reader is ready for Prime Time. I installed it after reading your post. It needs a lot of help in the opening interface -- just an otherwise blank screen that says "Bookshelf." I finally right-clicked and got an "Add" button down in the lower right corner. I navigated to my book collection and opened an ePub book I am currently reading in Freda. I did that before I started this post. It is still opening that file, . . . . . or something. Maybe it's gone to lunch, although it really is supper time here in Georgia.
Film at eleven? :-)
p.s.: Aha! Just as I was about to hit the Post button, it opened the file. Nope; it's not ready for Prime Time. Freda is a much better ePub reader.