Darkness at the Break of Noon

Darkness at Noon (German: Sonnenfinsternis) is a novel by Hungarian-born British 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 had helped to create. And of course the title is from Herr Zimmerman.