8vo. 188pp. Original publisher's tan cloth, lettered in red, printed paper dustwrapper. Light shelf-wear, dustwrapper price-clipped, chipping to corners, spine panel restored, paper repairs to verso. Internally clean and crisp.

The first edition of the third published novel of Hungarian British author and journalist Arthur Koestler's (1905-1983) trilogy concerning the conflict between morality and expedience, and his first full-length work in English.