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. 

Gallipoli (1916), by John Masefield

The British-led effort in 1915 to take the Gallipoli peninsula in Turkey and take control of the Dardanelles waterway is one of the most debated and discussed campaigns of World War I.

An early contributor to this discussion was the famous British writer John Masefield, who took a break from his usual work as poet, playwright, and novelist to write the 1916 book Gallipoli.

England's Effort (1916), by Mrs. Humphry Ward

About 18 months into World War I, the English novelist Mrs. Humphry Ward (Mary Augusta Ward) felt compelled to explain to an American friend how English society was meeting the challenges of the war.

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.

When the Prussians Came to Poland (1916), by Laura de Turczynowicz

The military advances of World War I led to many occupied villages, towns, and cities. When the Prussians Came to Poland: The Experiences of an American Woman during the German Invasion describes how the author Laura de Gozdawa Turczynowicz (1878-1953) survived the occupation of Suwalki, Poland in 1915.

The Backwash of War (1916), by Ellen N. La Motte

When an injury removed a soldier from the field of battle in World War I, his fate often rested with medical workers far from the fighting. The responsibilities of these medical workers are graphically and soberly described in The Backwash of War: The Human Wreckage of the Battlefield as Witnessed by an American Hospital Nurse, by Ellen N. La Motte (1873–1961).

The German Soul In Its Attitude Toward Ethics and Christianity, the State and War (1916), by Friedrich von Hügel

A discussion that began when World War I broke out—the influence of the German personality on the war—was continued in The German Soul In Its Attitude Towards Ethics and Christianity, The State and War. When the war started in August 1914, much attention was given to the 1911 book Germany and the Next War, by Frederick von Bernhardi.

The First Seven Divisions (1916), by Ernest W. Hamilton

The entry of England into the European war of August 1914 is often seen as the official start of World War I. The First Seven Divisions by Ernest W. Hamilton (1858-1939) is a detailed account of how those first British troops influenced the early months of the war.

They Shall Not Pass (1916), by Frank H. Simonds

Historical accounts of the long and costly Battle of Verdun in 1916 usually discuss the influence of French politics on the battle.

These politics are a main topic in They Shall Not Pass, by the prominent war correspondent and historian Frank H. Simonds (1878-1936), who earlier wrote the 1914 book The Great War: The First Phase.

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.

My Home in the Field of Honour (1916), by Frances Wilson Huard

My Home in the Field of Honour by Frances Wilson Huard continued the civilian eyewitness reports that earlier included A Hilltop on the Marne (1915) by Mildred Aldrich. An advertisement in the December 10, 1916 edition of the St. Louis Post-Dispatch described the book as the "simple, intimate, classic narrative which begins where 'The Hilltop on the Marne' leaves off."

Above the Battle (1916), by Romain Rolland

Most books about World War I that were published during the war included some observations about the moral and ethical issues of the war—what was right and wrong, how people were treating each other.

These issues were the main focus of Above the Battle, by Romain Rolland (1866-1944). He was the famous French author of the long novel Jean-Christophe, which was published between 1904 and 1912 and helped Rolland earn the Nobel Prize for Literature in 1915.