* Third president of the United States (1801-1809)
* Author of the Declaration of Independence
* Wrote numerous letters, essays, and books on a variety of topics, including politics, philosophy, religion, and science
John Adams
* Second president of the United States (1797-1801)
* Author of "A Defence of the Constitutions of Government of the United States of America" (1787-1788)
* Wrote numerous letters, essays, and diaries on a variety of topics, including politics, philosophy, and history
James Madison
* Fourth president of the United States (1809-1817)
* Co-author of The Federalist Papers (1787-1788)
* Wrote numerous letters, essays, and speeches on a variety of topics, including politics, philosophy, and history
Abraham Lincoln
* 16th president of the United States (1861-1865)
* Author of the Gettysburg Address (1863)
* Wrote numerous letters, speeches, and essays on a variety of topics, including politics, philosophy, and law
Woodrow Wilson
* 28th president of the United States (1913-1921)
* Author of "The New Freedom" (1913)
* Wrote numerous books, articles, and speeches on a variety of topics, including politics, philosophy, and history
Jimmy Carter
* 39th president of the United States (1977-1981)
* Author of numerous books, including "Why Not the Best?" (1975) and "Keeping Faith: Memoirs of a President" (1982)
* Has written extensively on a variety of topics, including politics, religion, and human rights
Barack Obama
* 44th president of the United States (2009-2017)
* Author of "Dreams from My Father" (1995) and "The Audacity of Hope" (2006)
* Has written extensively on a variety of topics, including politics, race, and social justice