I installed the fbreader package and tried to open an epub book.
It opened the book but the page change forward and page change backward buttons were greyed out and didn't function.
I would use fbreader if the page movement buttons worked but scrolling through text is not very useable.
The book was Bypass-Gemini by Joseph Lallo, epub version, its free download.
Edit: It is not possible to enter any number into the goto-page field either.