Iron Empires: Robber Barons, Railroads, and the Making of Modern AmericaAudiobookIron Empires: Robber Barons, Railroads, and the Making of Modern AmericabyMichael HiltzikRating: 5 out of 5 stars5/5Save Iron Empires: Robber Barons, Railroads, and the Making of Modern America for later