Background: Glenn Lee Beck (born February 10, 1964) is an American talk show host, political commentator, and producer. He is the CEO, founder, and owner of Mercury Radio Arts, the parent company of his television and radio network TheBlaze. A conservative, he hosts the Glenn Beck Radio Program, a popular talk-radio show nationally syndicated on Premiere Radio Networks. Beck also hosts the Glenn Beck television program, which ran from January 2006 to October 2008 on HLN, from January 2009 to June 2011 on the Fox News Channel and currently airs on TheBlaze.
Context: In June 2010, investigative reporter Alexander Zaitchik released a critical biography titled Common Nonsense: Glenn Beck and the Triumph of Ignorance, with a title mocking Beck's work, Common Sense. In an interview about the book, Zaitchik theorized, "Beck's politics and his insatiable hunger for money and fame are not mutually exclusive", while stating:  Beck's true religion is not Patriotism, Mormonism, or Conservatism. His true religion is cross-platform self-marketing ... According to Beck's worldview, there's no inherent contradiction between his sophisticated instinct for self-promotion, his propagandist rodeo clown act, his self-image as a media mogul, and his professed belief system. I think he actually believes that God wants him to make a ton of money and become this huge celebrity by fear mongering and generally doing whatever it takes in the media to promote right-wing causes.  In September 2010, Philadelphia Daily News reporter Will Bunch released The Backlash: Right-Wing Radicals, High-Def Hucksters, and Paranoid Politics in the Age of Obama. One of Bunch's theses is that Beck is nothing more than a morning zoo deejay playing a fictional character as a money-making stunt. Writer Bob Cesca, in a review of Bunch's book, compares Beck to Steve Martin's faith-healer character in the 1992 film Leap of Faith, before describing the "derivative grab bag of other tried and tested personalities" that Bunch contends comprises Beck's persona:  His (Beck's) adenoidal 'Clydie Clyde' voice is based on morning zoo pioneer Scott Shannon's "Mr. Leonard" character. His history is borrowed from the widely debunked work of W. Cleon Skousen. His conspiracy theories are horked from Alex Jones and maybe Jack Van Impe. His anti-Obama, anti-socialist monologues are pure Joe McCarthy. His chalkboard is stolen from televangelist Gene Scott. His solemn, over-processed radio monologue delivery is a dead ringer for Eric Bogosian in Talk Radio. This is all well-worn stuff, but no one has drawn it all together and sculpted it for the purpose of conning an especially susceptible audience during turbulent racial and economic times.  In October 2010 a polemical biography by Dana Milbank was released: Tears of a Clown: Glenn Beck and the Tea Bagging of America.
Question: what was the book about?

Answer:
Tears of a Clown: Glenn Beck and the Tea Bagging of America.