PixelBoy: Good advice, but where can one get books which are in a common, DRM-free format and sold by one price for the whole world?
Mnemon: Who needs one price for the world when there's still the option of second hand? Most of my books (hundreds and hundreds of them) come that way. Quite a number for as little as 10 pence at times [from a collector's book shop who sells off those from lots he buys that aren't necessarily collectors worthy, including hard backs.] - up to 3 pounds from other local bookshops.
I prefer to read my books in the original language whenever possible, and there really isn't that much offering of English language second hand books outside of English-speaking countries. Of course there's Amazon and eBay, but then you need to add shipping costs and you need to wait at least a week to get the books.
And you can't even see the condition of the books when buying, you need to rely on seller's description to know that, and you need to check seller's feedback to to see if he is trustworthy to begin with, etc.
Bothersome. Time-consuming. Expensive.
So one price, DRM-free, instant download ebooks would really be a prefered option here.
Unfortunately, like said, such service just hasn't been started yet.
Then again, there's no DRM-free FLAC-based one price music store with a good, wide catalogue either.