According to Kenneth Lloyd Billingsley in an article published in 2000, the Communists considered Koestler's novel important enough to prevent its being adapted for movies; the writer Dalton Trumbo "bragged" about his success in that to the newspaper The Worker.
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Kingsley Martin, reviewing Darkness at Noon, described the novel as "one of the few books written in this epoch
His experiences in prison led him to write Darkness at Noon and newspaper articles campaigning for the abolition of capital punishment in the 1950s.
Koestler's incarceration in the Spanish Civil War, by the Phalange - documented in Spanish Testament (1937), and revised 1942 as Dialogue with Death, and which formed part of the basis for his novel Darkness at Noon (1940).
Heart of Darkness | High Noon | Edge of Darkness | Warcraft II: Tides of Darkness | The Whisperer in Darkness | Shanghai Noon | With Fear I Kiss the Burning Darkness | When Darkness Comes | Under Cover of Darkness | The Ghost and the Darkness | Star Trek Into Darkness | Our Lady of Darkness | Noon | Land of Silence and Darkness | Jamie Noon | Darkness Dynamite | Darkness | Beyond the Darkness | The Ballad of High Noon | Prince of Darkness | prince of darkness | Noon Wine | Noon (musician) | Light in My Darkness | Lest Darkness Fall | Jeff Noon | High Tide at Noon | High Noon (2009 film) | Green Darkness | Eclipso: The Darkness Within |