3 ms·

Specifically which?

• jasonlotito 12y ago
  Copyright. I'd imagine they don't have the copyright to distribute things in this manner outside the US at the moment.
• fleshgolem 12y ago
  Depends on country. Laws for selling books can actually get quite complicated (http://en.wikipedia.org/wiki/Fixed_book_price_agreement http://en.wikipedia.org/wiki/Fixed_book_price_agreement)