War (International law) — Audiobooks

The Rights of War and Peace
by Hugo Grotius

Letters to "The Times" upon War and Neutrality (1881-1920)
by Thomas Erskine Holland

The Laws of War, Affecting Commerce and Shipping
by H. Byerley (Henry Byerley) Thomson

The War Book of the German General Staff Being "The Usages of War on Land" Issued by the Great General Staff of the German Army
by Prussia (Germany). Armee. Grosser Generalstab. Kriegsgeschichtliche Abteilung II