DARKNESS AT NOONArthur Koestler Macmillan ($2.50).
Of Author Arthur Koestler little is definitely known. (He is said to be in London.) But he has written the most exciting novel of the season. As a war correspondent in Spain, he was captured by the Fascists, sentenced to death and released when the British Government intervened; in Cairo he once edited a German-Arabic weekly; in Haifa he once hawked lemonade in the streets. In 1939 he published a historical novel, The Gladiators, about the Spartacus revolt. From Darkness at Noon, it is obvious that he also knows Russia and the deep places...