The First Family DetailBy: Ronald Kessler NEW YORK TIMES BESTSELLER Ron Kessler appears to get everything first.Slate As in a play, presidents, vice presidents, and presidential candidates perform onstage for the public and the media. What the nations leaders are really like and what goes on behind the scenes remain hidden. Secret Service agents have a front row seat on their private lives and those of their wives and children. Crammed with new headline making revelations,