Alot of non-fiction books are fattened up to be economically viable. People often buy a book for only one or two chapters of interest. eBooks have the ability to make the 50 page book economically viable, possibly changing what gets published. we're already seeing this from trade and professional associations. $30 50-100 page PDF eBooks.

Just as music listeners have moved away from albums to buy single songs, non-fiction book buyers will move away to buying chapters, and in time changing publishing to something that resembles "monographic articles".

What libraries will do with these I'm not sure. Right now they will not let us host them, due to an absence of TPM/DRM, so we print, bind and catalogue. Sad but true.