American Inventors, Entrepreneurs, and Business Visionaries, Revised Edition 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 current visionaries such as Bill Gates. This A-to-Z biographical dictionary has been fully updated to include an array of new and fascinating biographies, from financier Warren Buffet to music mogul Jay-Z. - Publisher.