Rereading "Six Days of War: June 1967 and the Making of the Modern Middle East" by Michael Oren.
"1914: The Days of Hope" by Lyn Macdonald. An account of the first year of the Great War from Mons to the First Battle of Ypres.
"International Relations in Political Theory" by Howard Williams. From Plato to Marx (via Hobbes, Rousseau, Hegel, Kant and others): an introduction to political thinking on war and international relations.