@tsarstepan,
In the beginning of
The Foreign Correspondent, part of the story takes place during the Spanish Civil War, does anyone know an accessible yet accurate history of the war?
Above and beyond the Ernest Hemingway novel though I might consider actually reading
For Whom The Bell Tolls (it would be my first foray into Hemingway territory) but after reading a nonfiction work. Doubly good if the history is in audiobook format so I can read it while at work.