It's a new book that's out this month by a chap called Stephen Poole, who's a painfully clever bloke who wrote an excellant analysis of videogames called 'Trigger Happy', which I also thoroughly recommend.
QUOTE (from the site)
How to decipher the news: UNSPEAK™ is a book on state-of-the-art rhetorical weaponry. It ranges from anti-social behaviour through intelligent design, ethnic cleansing, weapons of mass destruction, and enemy combatants in the war on terror, to democracy, freedom and extremism.
There's some extracts on the site - it looks like pretty heavy going (see the above comment about being painfullly clever), but some really really good stuff. I'll certainly be checking it out.
P.S. Remember to use the links off the bottom of this site if you pick it up from Amazon.