Cathie Black is the wise, funny mentor that every woman dreams of having. She was a pioneer in advertising sales at a time when women didn't sell; served as president and publisher of the fledgling USA Today ; and, in her current position as the president of Hearst Magazines, persuaded Oprah to launch a magazine. In 2006 she was named one of Fortune's "50 Most Powerful Women in American Business" for the seventh consecutive year. Now, in the exuberant,...