I recommend your importing your academic materials into the free Calibre program, installing Calibre Companion on your mobile devices (smartphone, tablet), and using DropBox (my preference) or Box.net as your cloud service. FYI, Calibre. and Google Drive don't work well together. See MobileRead's
E-Book Software threads for
Calibre and
Calibre Companion.
As far as mobile readers go, I prefer
Moon+ Reader Pro.
Regarding Kobo: see Apprentice Alf's tools and instructions.