Sales of George Orwell's 1984 rose 6,000% following the Edward Snowden revelations

"Sales of George Orwell's 1984 have shot up following revelations that the United States' National Security Agency (NSA) is accessing data on people around the world.
Sales of Orwell's novel have risen by 6,000% since the Guardian revealed the allegations of former NSA sub-contractor Edward Snowden.
In the dystopian novel, all citizens are constantly spied on by an inner elite party in the government.
Banners reading "Big Brother Is Watching You" cover the city and citizens are monitored by the Thought Police, who punish people for independent thinking.
After Snowden leaked the top secret files relating to the Washington's highly confidential Prism programme, questions have been raised about the ethical implications of the surveillance."

Source:  International Business Times, 11th June 2013

Note - Clearly if we don't know what they rose from and to, and over what time period, (how many copies would it sell normally), which countries this covers, and what other activity was happening (new editions, promotions) it's a bit of a suspect stat.  #CaveatEmptor