This book profiles more than 300 important Americans from colonial times to the present. Featuring such inventors and entrepreneurs as Thomas Edison and Madame C.J. Walker, this revised resource provides in-depth information on robber barons and their counterparts as well as visionaries such as Bill Gates. Coverage includes Jeffrey Bezos, Michael Bloomberg, Sergey Brin and Larry Page, Michael Dell, Steve Jobs, Estee Lauder, T. Boone Pickens, Russell Simmons, Oprah Winfrey, Mark Zuckerberg.