Found in 1 comment on Hacker News
krishna2 · 2017-09-05 · Original thread
For Rockefeller, there is Ron Chernow's.

There is also this book : The Tycoons: How Andrew Carnegie, John D. Rockefeller, Jay Gould, and J. P. Morgan Invented the American Supereconomy Reprint Edition, Kindle Edition by Charles R. Morris

Links: https://www.amazon.com/Titan-Life-John-Rockefeller-Sr-ebook/...

https://www.amazon.com/Andrew-Carnegie-David-Nasaw-ebook/dp/...

https://www.amazon.com/Tycoons-Carnegie-Rockefeller-Invented...

Fresh book recommendations delivered straight to your inbox every Thursday.