Darkness at Noon (Sonnenfinsternis) is a novel by Hungarian-born novelist Arthur Koestler, first published in 1940. His best known work, it is the tale of Rubashov, an Old Bolshevik who is arrested, imprisoned, and tried for treason against the government that he helped to create.
The novel is set between 1938 and 1940, after the Stalinist Great Purge and Moscow show trials. Despite being based on real events, the novel does not name either Russia or the Soviets, and tends to use generic terms to describe people and organizations: for example the Soviet government is referred to as "the Party" and Nazi Germany is referred to as "the Dictatorship". Joseph Stalin is represented by "Number One", a menacing dictator. The novel expresses the author's disillusionment with the Bolshevik ideology of the Soviet Union at the outset of World War II.
In 1998, the Modern Library ranked Darkness at Noon number eight on its list of the 100 best English-language novels of the 20th century, even though Koestler wrote it in German.
Koestler wrote Darkness at Noon as the second part of a trilogy: the first volume was The Gladiators (1939), first published in Hungarian. It was a novel about the subversion of the Spartacus revolt. The third novel was Arrival and Departure (1943), about a refugee during World War II. Koestler, who was by then living in London, rewrote that novel in English after the original German version had been lost.
Darkness at Noon was commenced in German while Koestler was living in Paris, and as he describes in the first chapter of Scum of the Earth, completed in the summer of 1939 just outside the village of Belvédère in the Alpes-Maritimes where he was staying with his companion, the sculptor Daphne Hardy, who translated it into English while she was living with him. For decades the German text was thought to have been lost during the escape of Koestler and Hardy from Paris in May 1940, just before the German occupation of France. However, a copy had been sent to Swiss publisher Emil Oprecht.