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 favorite 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 pediatr