@mcc I'm not sure what's the problem you can just download an epub and open it in a compatible reader (google play books will open them, I've used ReadEra before)
@mcc tbh I don't remember why I stopped using play books but readera is pretty nice
play books syncs your books between devices and is a bit more streamlined
@mcc oh, and readera can automatically search your file system for epubs and list them
@mcc you can probably do the same thing in Files