John Prendergast and Michael Mattocks talked about their joint memoir. When he was 20-years old Mr. Prendergast, a human rights activist and co-founder of the Enough Project, became a Big Brother to Mr. Mattocks when the latter was a homeless 7-year-old in Washington, D.C. They were interviewed by Ann Curry and also responded to questions from members of the audience at McNally Jackson Books in New York City.