Crosmando: Hasn't Humble Bundle been doing books (or was it audiobooks?)
They did both and actually added a book bundle widget on their website. I think they start fortnightly on Wednesdays.
the_atm: I think that'd be cool and something I'd definitely buy into however I'm thinking GOG would have to invest in a mobile app of some kind. I may just be speaking on behalf of my self here, but I'd rather not read a full novel on my PC...
It's still an idea, though how it would fit into GOG'S name... Good Ol' Games is beyond me haha.
Hahaha imagine lugging your gaming rig (with a 100m extension cord) next to the deckchair by the pool. Assuring everybody around you that you are "merely" reading the latest Neil Gaiman novel DRM-free pdf from your PC, because gamers are people too!