There's something just not right about this:

Richard Sarkis and David Kinsley were juniors at Williams College, surfing the net for a cheap source for their economics textbook, when they discovered a little known economic fact: the very same college textbooks used in the United States sell for half price — or less — in England.

Just like prescription drugs, textbooks cost far less overseas than they do in the United States. The publishing industry defends its pricing policies, saying that foreign sales would be impossible if book prices were not pegged to local market conditions.

From The New York Times.