how five Americans made their country a world power
Zimmermann, Warren
2004
Profiles the lives and relationships of five figures who helped the United States become a major player in world politics at the dawn of the twentieth century.
John Hay, John Nicolay, and the war for Lincoln's image
Zeitz, Joshua
2014
Follows Lincoln's presidential secretaries, John Hay and John Nicolay, through the Civil War years, including letters, diaries, and memoirs as primary sources.