Koestler,
Arthur 1905-83; Brit. writer & philosopher, born in Hungary
See Koestler in American Heritage Dictionary 4
(kĕstˈlər, kĕsˈ-), Arthur 1905-1983.
Hungarian-born British writer whose novel Darkness at Noon (1940) portrays his disillusionment with Communism. His nonfiction works include The Sleepwalkers (1959) and The Ghost in the Machine (1967).