PakCat catalogue record The Sleepwalkers A History of Man's Changing Vision of the Universe By Koestler, Arthur Bibliographic details ISBN0140209727 PublisherPenguin Books Publication placeLondon Publication year1959 LanguageEnglish Material typeBook Physical description626p. SubjectsEurope—History—1871–1918, Europe—Foreign relations—1871–1918, Diplomacy—Europe—History—20th century