In her new book, the feminist author Martine Delvaux links her own experience as a writer with that of the American photographer and installation artist Nan Goldin, whose life has been marked by the suicide of her beloved older sister Barbara, and who is best-known for her intimate portrayals of the sexual underground.In her new book, the feminist author Martine Delvaux links her own experience as a writer with that of the American photographer and installation artist Nan Goldin, whose life has been marked by the suicide of her beloved older sister Barbara, and who is best-known for her intimate portrayals of the sexual underground.