ok there are some big books out there - but 8 x copies of complete works of charles dickens is still only 480MB, way short of the claimed 1.5Gb !
anyway to put this to rest ?!
if you really must carry so many words & pictures around , then you don't go for loading converted epubs onto a reader that cannot take additional SD cards, or storage upgrades .Get one that can read SD cards, & with a nifty cover that also has 2 slots for spare SD cards.
like this one
http://www.amazon.co.uk/Navitech-Lea...ader+650+cover
With that setup , on a reader like say my old sony prs-650 you have the internal storage + 2 x SD cards slotted in, + 2 more slotted into the cover for quick swapsies
( and no faffing about with DRM removal. format conversion needed)
room for all the books mentioned so far + about 1/2 a million others
personally I still think cloud storage is the way to go .
not sure if there's an easy way for your web-enabled reader to browse & grab books from your google drive/ sky drive/ dropbox et al, but if not I expect someone will invent one.