Three thousand years of espionage : an anthology of the world's greatest spy stories / K. Singer German spies in England / W. le Queux secret service woman, being confessions, experiences and opinions of Olga von Kopf, the famous international spy / H. de Halsalle Spies and traitors : a short history of espionage / Kurt Singer Nederlandse schilderkunst : tussen detail en grandeur / Ad van der Blom, Ernest Kurpershoek, Claudia Thunnissen ; [red.: Kunsthistorisch advies en organisatiebureau D'Arts, Paul Spies] background book spy web : a study of communist espionage / by Francis Noel-Baker Steinhauer, the kaiser's master spy : the story as told by himself / [Steinhauer] ; ed. by S.T. Felstead ; with an introduction by Reginald … 1650 : bevochten eendracht / Willem Frijhoff en Marijke Spies ; met medew. van Wiep van Bunge en Natascha Veldhorst
