Editing John Hay (section)

==Further reading==
*[[Michael Burlingame]], ed. (2021). ''Abraham Lincoln: The Observations of John G. Nicolay and John Hay''. Carbondale, Illinois: Southern Illinois University Press. {{ISBN|978-0809338634}}
{{external media| float = right| video1 = [https://www.c-span.org/video/?408614-1/mark-zwonitzer-discusses-the-statesman-storyteller Presentation by Zwonitzer on ''The Statesman and the Storyteller'', April 26, 2016], [[C-SPAN]]}} 
* Philip McFarland, ''John Hay, Friend of Giants: The Man and Life Connecting Abraham Lincoln, Mark Twain, Henry James, and Theodore Roosevelt'' (Lanham, MD: Rowman and Littlefield, 2017)
* {{cite book|author=Helen Nicolay |title=Lincoln's Secretary: A Biography of John George Nicolay |year=1949|publisher=Longman's Green}} [https://timesmachine.nytimes.com/timesmachine/1949/03/13/96449435.html?pageNumber=89 Review] by [[James G. Randall|J. G. Randall]]. Helen Nicolay was John G. Nicolay's daughter.
* [[Patricia O'Toole]], ''The Five of Hearts: An Intimate Portrait of Henry Adams and His Friends, 1880–1918'' (New York: Clarkson Potter, 1990)
* [[Warren Zimmermann]], ''First Great Triumph: How Five Americans Made Their Country a World Power'' (New York: Farrar, Straus and Giroux, 2002)
* [[Mark Zwonitzer]], ''The Statesman and the Storyteller: John Hay, Mark Twain, and the Rise of American Imperialism'' (Chapel Hill, NC: Algonquin Books, 2016)