The American book publishing industry is worth more than the movie and music industries combined. The average college student spends over $1000 a year on books.
Most college students prefer to torrent their book when it is available.
Most books are not available by torrent. Why would someone go through the effort and risk of uploading a torrent when they don't get any benefit?
Truthcoin changes the rules. A dominant assurance contract can be created to pay the person who uploads the torrent.