American Entrepreneurs: Rupert Murdoch

Rupert Murdoch: The Untold Story of the World's Greatest Media Wizard by Neil Chenoweth                                         https://archive.org/details/rupertmurdochunt00chen

American Entrepreneurs: Sam Walton

In Sam We Trust: The Untold Story of Sam Walton and Wal-Mart, the World's Most Powerful Retailer by Bob Ortega https://www.amazon.com/dp/0812932978/ref=cm_sw_r_tw_dp_U_x_Q1i4Cb3W6Q6MY