Fear God and Take Your Own Part (1916), by Theodore Roosevelt

Fear God and Take Your Own Part was a followup to Theodore Roosevelt's 1915 book, America and the World War.  That earlier book was a collection of writings by Roosevelt in late 1914, after war had broken out in Europe.

In Fear God and Take Your Own Part, Roosevelt wrote about the response of the United States to German aggression during the war, in particular the sinking of the Lusitania in 1915, which caused the deaths of many United States citizens. 

Over the Top (1917), by Arthur Guy Empey

When American soldiers began their training after the United States entered World War I in 1917, many of them probably had a copy of the book Over the Top: By an American Soldier Who Went.

Why We Are At War (1917), by Woodrow Wilson

The official reasons for the entry of the United States into World War I on April 6, 1917 are stated in Why We Are At War, by U.S. President Woodrow Wilson.

The War and Humanity (1916), by James M. Beck

The War and Humanity: A Further Discussion of the Ethics of the World War and the Attitude and Duty of the United States by James M. Beck (1861-1936) was a sequel to that author's earlier book The Evidence in the Case as to the Moral Responsibility for the War (1915). However, The War and Humanity had a more partisan tone than The Evidence in the Case.

The Writing on the Wall: The Nation on Trial (1916), by Eric Fisher Wood

As World War I raged in Europe, many people in the United States thought more seriously about how well the United States could defend itself against an attack by another country.

The Writing on the Wall: The Nation on Trial by Eric Fisher Wood (1889-1962) added to the discussion of such concerns, following the earlier publication of books like American and the World War (1915), by Theodore Roosevelt.

America and the World War (1915), by Theodore Roosevelt

When World War I broke out, many people in the United States wondered how their country should react. Should the U.S. give any verbal or material support to any of the countries fighting in the war? Should it prepare for possible involvement in the war?

A strong advocate for increased military preparedness was former U.S. President Theodore Roosevelt, who outlined his proposals in a series of newspaper articles that was published by the Wheeler Syndicate from September 1914 to December 1914. These articles were included in a book that was published in January 1915—America and the World War.