the psychopath test :

British journalist Jon Ronson is obsessed with ...obsessives. He's best known for writing the book turned into the George Clooney movie The Men Who Stare At Goats. In his latest book, Jon Ronson has turned his own obsessive eye to psychopaths. It's called The Psychopath Test.

You may have heard a couple of Jon Ronson's stories in the book on This American Life. One was about a man named Tony locked up in Britain's Broadmoor Hospital. He says he was sent there after he faked mental illness to avoid prison and now - in a Catch-22 situation - Tony says no one believes that he actually is sane. And he's stuck there.