On my Onyx Boox T68, i use "Epub reader and Free epub Books as mai reader:
https://play.google.com/store/apps/d...ownload.reader
It spports sideloaded fonts, themes, internal epub Css, fora and stardict dictionairies and more.
With "white bottom" it's perfect for reading.
I think i've at last found my personal killer app fore epub reading on android devices (i use it also on my nexus-5).
Another useful app is "Swapps! All apps", here:
https://play.google.com/store/apps/d...hiztech.swapps
Having a customizable app-launch bar with no need to go in home screen is very comfortable, during reading.
HP