THE INVISIBLE WRITING (431 pp.)Arthur KoestlerMacmillon ($5).
It was perhaps a comradely warning when seedy Otto Katz (who was later purged in Prague) told seedy Arthur Koestler (who lived to write about it) that everyone had inferiority complexes of various sizes but that Koestler's was not a complex. It was a cathedral.
The time was 1937. The place: Paris. Both men were Communist functionaries. Koestler, in fact, had just been sprung from a Franco prison and, as a liberal martyr, was welcomed with flowers at the Gare du Nord. But by then Comrade Koestler had...