but i kept at it, the secret is persistence. brian: how do you pick your books? laurence: it is a stupid thing to do. i should choose an area and keep at it, but i wanted to do something much different. experience different lives. when you write a nonfiction book, you are thinking back in somebody's life. i want to piggyback on as many lives as i can. brian: of the 15 books, which one sold the most? laurence: "the kennedy women," by a longshot. a multigenerational book about women. nobody had ever written a multigenerational book about women. to put women at the forefront just totally changed things. brian: what about the kennedy women do you most remember and what did the audience want to hear when you talked to them? laurence: it was a book -- i suggested that you do not have to be a woman to love the kennedy women. it was a book read by women.