In Mark Twain and the Colonel, Philip McFarland tells the story of the rich years of American history between 1890 and 1910 through the fully engaged involvement of two of its most vital participants.

The narrative unfolds in six sections, each focusing on a different aspect of the United States of the early twentieth century that continues to matter to this day: America as an imperialist nation, America as a continental nation, America as a racial nation, America as a corporate nation, America at home, and America striving for peace.

In this short span of years, the America of the late nineteenth century will move substantially closer to the America we know today, thanks in part to the influence and actions of Mark Twain and Theodore Roosevelt, two of the most influential figures of the age.