It is a fascinating read, although the book is a little thick. It tells the life story of one of, if not the greatest American industrialist. John D. Rockefeller built an empire in 20 years. He was self-made (although he did not grow up poor as his father was a snake-oil salesman, he had no money to start his business and had to take loans from his father, unlike Trump), self-taught (no college, no mentor in business other than his father), and devoted to religion. He donated the majority of his wealth away. He abstained from smoking, drinking, and partying for his whole life.<p>His business practices were highly controversial though. Lots of them were banned later for stifling competitions and innovations. For instance he used the scale of Standard oil to get exclusive rebates with railroads, which were later considered to be common carrier and should treat all customers fairly. He also signed lots of exclusive agreements with oil producers, which would starve other refiners.