The publishing industry is creating a monster with their practices, and they have only themselves to blame. I've seen torrent trackers which are dedicated to textbooks, frequented by students sick of the "new edition" games. I've also heard of students pooling their money to buy a copy of a text, which is then sacrificed to a sheet-fed scanner. Everybody gets an electronic copy that way, for a fraction of the price. Then you have DIY book scanners, which don't even destroy the text (which means you can return it after copying it and sharing the pirate e-copy with everyone).