There was not much in Jenny McCarthy’s early career as a Playboy model and MTV star to suggest that she would become a passionate advocate for family issues, children’s health and autism awareness. But the birth of her now almost 7-year-old son Evan, who developed autism early in life, changed all of that. McCarthy has become a best-selling author, first of lighter stuff like Baby Laughs and Life Laughs; then of more serious fare, like Louder than Words: A Mother’s Journey in Healing Autism.