“A. Scott Berg’s more recent Wilson; John Keegan’s wrenching The First World War; Martin Gilbert’s The First World War; Gerhard Ritter’s The Schlieffen Plan; Lowell Thomas’s 1928 book about World War I U-boats and their crews, Raiders of the Deep; Reinhard Scheer’s Germany’s High Sea Fleet in the World War; Churchill’s The World Crisis, 1911–1918; Paul Kennedy’s The War Plans of the Great Powers, 1880–1914; and R. H. Gibson and Maurice Prendergast’s primer, The German Submarine War, 1914–1918. I.”

“A. Scott Berg’s more recent Wilson; John Keegan’s wrenching The First World War; Martin Gilbert’s The First World War; Gerhard Ritter’s The Schlieffen Plan; Lowell Thomas’s 1928 book about World War I U-boats and their crews, Raiders of the Deep; Reinhard Scheer’s Germany’s High Sea Fleet in the World War; Churchill’s The World Crisis, 1911–1918; Paul Kennedy’s The War Plans of the Great Powers, 1880–1914; and R. H. Gibson and Maurice Prendergast’s primer, The German Submarine War, 1914–1918. I.”

— Erik Larson