Recommendation for an eBook reader for Gnome

There are eBook readers for Android, there's Okular for KDE, and stuff like that, but what I want, is an eBook (ePub format) reader for my normal Linux desktop. I know there's Calibre , which goes way beyond being just an eBook reader, and theres FBReader , Which doesn't really work as of yet. Given that eBooks have been around for several years now, I'd assume, more software would've sprung up by now.