Taylor Caldwell, whom millions know for her powerful novels about American industrial dynasties, writes here in the vein of her greatest successes. Her theme is one welling from the heart-springs of American life - the story of the Interstate, a railroad founded in the latter days of Jackson's presidency, which grew through one hundred stormy, changeful years of our history into a vast enterprise; and the story of the extraordinary family with whom its fortunes were intertwined, the deWitts. It is 1866. In the small Pennsylvania city of Portersville, headquarters of the Interstate, old Aaron deWitt watches enigmatically as his two sons struggle for control of the railroad he founded.