From her article (and a Google bears her out. Note this is a "first in line" at a different location than Mr. Packer attended.):
First in line for Hillary's book at Barnes & Noble at Lincoln Center on Sunday night was Charles Greinsky, who told the New York Daily News he rushed out at midnight to get one of the first books because he supported Hillary's health-care plan. A few years ago, the Associated Press identified Greinsky more fully. It turns out he is "a longtime Clinton campaigner" from Staten Island, who has been the Clintons' guest several times both at the White House and at their home in Chappaqua, N.Y.