People at least figured out enough about the format of the dialog files to get the English text enabled in the German version of the game, so maybe someone playing around with the PC version has figured out how to access the text of the in-game books? I don't recall that being brought up in the forum, though.
Prima was suppose to put out a guide for D2:ED, which they put on their site briefly, changed the listing to 'coming soon' and then canceled. I assume any exclusivity deal has long since expired, so maybe Larian still has some story related stuff around that they had provided to Prima...
