Meh, I'm not going to lie - I was a little disappointed with the series...
I have done quite a bit of research and reading on these characters in the past, so that may have been one of the reasons my expectations for the series wasn't met.
If you want to learn more about these people, here are some great bios to read. Some of them are long, but they are the kinds of books that you start and can't put down. I personally own and recommend all of them.
(They are listed in order of preference...)
[ame=http://www.amazon.com/The-First-Tycoon-Cornelius-Vanderbilt/dp/1400031745/ref=sr_1_1?ie=UTF8&qid=1370963723&sr=8-1&keywords=cornelius+vanderbilt]The First Tycoon: The Epic Life of Cornelius Vanderbilt: T.J. Stiles: 9781400031740: Amazon.com: Books[/ame] (Vanderbilt)
[ame=http://www.amazon.com/Andrew-Carnegie-David-Nasaw/dp/0143112449/ref=pd_sim_b_4]Andrew Carnegie: David Nasaw: 9780143112440: Amazon.com: Books[/ame] (Carnegie)
[ame=http://www.amazon.com/Peoples-Tycoon-Henry-American-Century/dp/0375707255/ref=sr_1_3?s=books&ie=UTF8&qid=1370963833&sr=1-3&keywords=henry+ford]The People's Tycoon: Henry Ford and the American Century: Steven Watts: 9780375707254: Amazon.com: Books[/ame] (Ford)
[ame=http://www.amazon.com/Dark-Genius-Wall-Street-Misunderstood/dp/0465068863/ref=sr_1_1?s=books&ie=UTF8&qid=1370963968&sr=1-1&keywords=jay+gould]Dark Genius of Wall Street: The Misunderstood Life of Jay Gould, King of the Robber Barons: Edward J. Renehan Jr.: 9780465068869: Amazon.com: Books[/ame] (Gould)
[ame=http://www.amazon.com/Titan-The-Life-John-Rockefeller/dp/1400077303/ref=pd_sim_b_1]Titan: The Life of John D. Rockefeller, Sr.: Ron Chernow: 9781400077304: Amazon.com: Books[/ame] (Rockefeller)
[ame=http://www.amazon.com/The-House-Morgan-American-Banking/dp/0802144659/ref=pd_sim_b_3]The House of Morgan: An American Banking Dynasty and the Rise of Modern Finance: Ron Chernow: 9780802144652: Amazon.com: Books[/ame] (Morgan)
^House of Morgan isn't specifically about J.P. but about the business as a whole, up until the late 80's. This books was OK, but not as good as the others...
Whatever, bro...