Condition: Acceptable. Please see the images for more details. Small amount of writing on spine. Translated from the German by Wendayne Ackerman. Designated on the cover as "Ace Science Fiction Special 4" First paperback edition of the 1973 English translation of the 1967 German translation of the 1964 Polish first edition. Blurb: “A space cruiser, in search of its sister ship, encounters beings descended from self-replicating machines. In the grand tradition of H. G. Wells and Jules Verne, Stanislaw Lem's The Invincible tells the story of a space cruiser sent to an obscure planet to determine the fate of a sister spaceship whose communication with Earth has abruptly ceased. Landing on the planet Regis III, navigator Rohan and his crew discover a form of life that has apparently evolved from autonomous, self-replicating machines—perhaps the survivors of a “robot war. ” Rohan and his men are forced to confront the classic quandary: what course of action can humanity take once it has reached the limits of its knowledge? In The Invincible , Lem has his characters confront the inexplicable and the bizarre: the problem that lies just beyond analytical reach.”
