A small selection of books and e-books that offer background and critical writing related to the literature of World War One.
The Cambridge Companion to War Writing by 
The Oxford Handbook of British and Irish War Poetry by 
Women's Writing on the First World War by 
The Great War and Modern Memory by 
Out of Battle : the poetry of the Great War by 
World War I and the American Novel by 
Bloody Good: chivalry, sacrifice, and the Great War by 
Writing War in the Twentieth Century by 