Question: Which adviser to the Donald Trump campaign had a biographical book about them written by Gabriel Sherman?

Context paragraphs:
Trump Unauthorized: Trump Unauthorized is a 2005 biographical television film about businessman and future president of the United States Donald Trump.  The film was directed by John David Coles and written by Keith Curran, and stars Justin Louis as Trump.  The film chronicles Trump's life, including his career and his marriages to Ivana Trump and Marla Maples.  "Trump Unauthorized" is based on multiple sources, including two biographies by Gwenda Blair titled "The Trumps: Three Generations That Built an Empire" and "Donald Trump: Master Apprentice".

Basket of deplorables: "Basket of deplorables" is a phrase from a 2016 presidential election campaign speech delivered by Democratic nominee Hillary Clinton on September 9, 2016, at a campaign fundraising event, which Clinton used to describe a faction of supporters of her general election opponent, Republican nominee Donald Trump.  Clinton later said that she "regrets saying half [of Trump's supporters]", and the Trump campaign repeatedly used the phrase against her during and after the 2016 presidential election.  Many Trump supporters adopted the "Deplorable" moniker for themselves.  After Clinton's loss, some journalists and political analysts questioned whether or not the speech played a role in the election's outcome.

The Loudest Voice in the Room: The Loudest Voice in the Room: How the Brilliant, Bombastic Roger Ailes Built Fox News - and Divided a Country is a 2014 biographical book about Fox News Channel president Roger Ailes written by Gabriel Sherman.  which debuted at #9 on The New York Times Bestseller list.

TrumpNation: TrumpNation: The Art of Being the Donald is a 2005 biographical book about Donald Trump that was written by Timothy L. O'Brien and published by Warner Books.  After the book was published, Trump filed a $5 billion lawsuit against O'Brien, who had written that Trump was not a billionaire and that his net worth actually ranged between $150 million and $250 million.  Trump sought $2.5 billion in compensatory damages and an additional $2.5 billion in punitive damages.  The lawsuit was dismissed in 2009, and an appeals court affirmed the decision in 2011.

Donald Trump (song): "Donald Trump" is a song by American rapper/singer Mac Miller, and the only song released as an official single from his mixtape "Best Day Ever".  The melody, which is played throughout the song, is taken from "Vesuvius" by Sufjan Stevens.  The music video to the song was uploaded to YouTube on March 3, 2011, while the single was released digitally on May 17, 2011.  "Donald Trump" is also incorrectly included as a bonus track on the track list of some versions of Mac Miller's debut album "Blue Slide Park".  Miller himself confirmed that the song does not feature on the album.  The song was dedicated to the American business magnate Donald Trump, who, five years after the song's release, was elected as the 45th President of the United States.  During Trump's 2016 campaign, the song regained popularity, hitting #28 on the iTunes Charts on November 9, 2016, the day after he was elected president.  However Mac Miller has personally stated in an interview that he was not a supporter of Trump.

Roger Ailes: Roger Eugene Ailes (May 15, 1940 – May 18, 2017) was an American television executive and media consultant.  He was the founder and one-time Chairman and CEO of Fox News and the Fox Television Stations Group, from which he resigned in July 2016 following allegations that he sexually harassed female colleagues.  Ailes was a media consultant for Republican presidents Richard Nixon, Ronald Reagan, and George H. W. Bush, and for Rudy Giuliani's first mayoral campaign.  In 2016, after he left Fox News, he became an adviser to the Donald Trump campaign, where he assisted with debate preparation.

Brad Parscale: Brad Parscale (born January 3, 1976) is an American digital media and political strategist.  He served as the digital media director for Donald Trump's 2016 presidential campaign.  Parscale began working for the Trump Organization in 2011, developing and designing websites, and creating and managing digital media strategies.  In early 2015, Trump hired Parscale and his firm, Giles-Parscale, to create a website for his exploratory campaign.  When Trump declared himself a Republican candidate in 2015, one of the first people he called was Parscale, asking him to update his exploratory campaign site into a "full-fledged presidential campaign website."  Throughout the Republican primary, Parscale was responsible for the Donald J. Trump for President website, as well as for digital media strategy and online fundraising campaigns.  In June 2016, Parscale was officially named digital media director for the Donald J. Trump for President campaign, overseeing all aspects of digital media and online fundraising, as well as traditional media strategy, like radio and television placements.  In January 2017, Parscale, along with another senior Trump aide, Nick Ayers, formally launched America First Policies, a non-profit organization that promotes President Trump's agenda and White House initiatives.

Donald Trump presidential campaign, 2000: Donald Trump's presidential campaign of 2000 for the nomination of the Reform Party began when real estate magnate Donald Trump of New York announced the creation of a presidential exploratory committee on the October 7, 1999 edition of "Larry King Live".  Though Trump had never held elected office, he was well known for his frequent comments on public affairs and business exploits as head of The Trump Organization.  He had previously considered a presidential run in 1988 as a Republican, but chose not to run.  For 2000, Minnesota Governor Jesse Ventura persuaded Trump to seek the presidential nomination of the Reform Party, which was fracturing despite achieving ballot access and qualifying for matching funds as a result of the 1996 presidential campaign of businessman Ross Perot.  Trump's entrance into the Reform Party race coincided with that of paleoconservative commentator Pat Buchanan, whom Trump attacked throughout the campaign as a "Hitler-lover."

Chalkening: The Chalkening was a protest that occurred on university campuses across the United States in March and April 2016, publicized by personnel affiliated with the Trump campaign, as well as numerous media outlets.  Dozens of universities were affected.  This protest mainly took the form of chalk writing in public areas on campus with slogans in support of the United States Presidential candidate, Donald Trump, such as "Trump 2016".

Dismissal of James Comey: James Comey, the 7th director of the Federal Bureau of Investigation (FBI), was dismissed by U.S. President Donald Trump on May 9, 2017.  Comey had been under public and political pressure as a result of both the FBI's role in the Hillary Clinton email controversy and the FBI's investigation of Russian interference in the 2016 U.S. elections, which also involves a possible collusion with the 2016 Donald Trump campaign.

Supporting paragraphs: The Loudest Voice in the Room Roger Ailes
Answer: Roger Ailes