She couldn`t have been more than seven or eight years old. "Go ahead, ask your question," her father urged, nudging her forward. She smiled shyly and said, "You`re my hero. Who`s yours?" Many people - especially girls - have asked us that same question over the years. It`s one of our favourite topics. HILLARY: Growing up, I knew hardly any women who worked outside the home. So I looked to my mother, my teachers, and the pages of Life magazine for inspiration. After learning that Amelia Earhart kept a scrapbook with newspaper articles about successful women in male-dominated jobs, I started a scrapbook of my own. Long after I stopped clipping articles, I continued to seek out stories of women who seemed to be redefining what was possible. CHELSEA: This book is the continuation of a conversation the two of us have been having since I was little. For me, too, my mom was a hero; so were my grandmothers. My early teachers were also women. But I grew up in a world very different from theirs. My pediatrician was a woman, and so was the first mayor of Little Rock who I remember from my childhood. Most of my close friends` moms worked outside the home as nurses, doctors, teachers, professors, and in business. And women were going into space and breaking records here on Earth.