Doesn't support Marshmallow? I've been using fbreader for many years  on the Nokia N770 and Sharp Zaurus  maybe even on Windows CE. I'm sad to say that my time with fbreader may be at an end  at least until Marshmallow support is added. For both the internal memory and SD card  I get a permission denied error when attempting to access directories on them. Consequently  I can't open any books but the built-in help book. Looks like I'm off to find an alternative  hope that fbreader adds Marshmallow support soon!
January 29 2016