3 BOOKS ABOUT SECOND WORLD WAR (ENGLISH)

Nigel West, Secret War The Story of Soe, Britain's Wartime Sabotage Organisation, Hodder & Stoughton, 1992 (2nd Edition)
Pierre Th. Brauschweig, Secret Channel to Berlin, The Masson-Schellenberg Connection and Swiss Intelligence in World War II, Casemate, 2004 (2nd Edition)
John H. Waller, The Unseen War in Europe, Espionage and Conspiracy Second World War, Random House, 1996 (1st Edition)