1905: Born in Budapest

1931: Joins the Communist Party of Germany

1938: Disillusioned by Stalinism, he leaves the Communist Party

1938: He writes The Gladiators (about the revolt of Spartacus)

1940: His most famous novel, the anti-Stalinist Darkness at Noon, is published

1943: Another novel, Arrival and Departure, is published

1956: The non-fiction Reflections on Hanging, which argued against capital punishment, is published

1968: He is awarded the Sonning Prize for his “outstanding contribution to European culture"

1972: He is awarded a CBE

1983: Koestler and his wife kill themselves

1998: A biography alleging Koestler was a serial rapist is published