I read Titan. Interestingly, it documents how SO's market share was declining steadily throughout the anti-trust trial, and Rockefeller was unable to stop it.
It runs against the conventional story of SO being an inevitable monopoly.
Well, at the time, the kerosene market was declining and there was nothing bringing it back. Right after the breakup, Henry Ford finally perfected the automobile, and Standard Oil came right back.
It is meticulously researched, though, and the bibliography is as good a place as any to look for further reading on Rockefeller.
Above and beyond that, simply as a history of the most important substance in all of human history beyond sheer biological necessities, it's utterly fascinating. It's principally through Yergin's work that I came to pretty much diametrically opposite conclusions of the future of energy from his.
It runs against the conventional story of SO being an inevitable monopoly.