When Rupert Murdoch enlisted Roger Ailes to launch a cable news network in 1996, American politics and media changed forever. With a remarkable level of detail and insight, New York magazine reporter Gabriel Sherman puts Ailes's unique genius on display, along with the outsize personalities--Bill O'Reilly, Sean Hannity, Megyn Kelly, Sarah Palin, Karl Rove, Glenn Beck, Mike Huckabee,...