The Guns of August: The Pulitzer Prize-Winning Classic About the Outbreak of World War I

The Assassination of the Archduke: Sarajevo 1914 and the Romance that Changed the World

The Last of the Doughboys: The Forgotten Generation and Their Forgotten World War

A World Undone: The Story of the Great War, 1914 to 1918

Storm of Steel (Penguin Classics Deluxe Edition)

The First World War

The Last Kaiser: The Life of Wilhelm II

King, Kaiser, Tsar: Three Royal Cousins Who Led the World to War

Yes. Mein Kampf must be included on such a list.

Now It Can Be Told

Movies and Documentaries