Anybody who likes a tight, increasingly tense plot-line rising to a scene of dramatic violence will be satisfied. Anybody who likes a mystery will find it here — and its solution.
Ursula K. Le Guin

A classic science fiction thriller by the author of “Solaris” for the first time translated directly from the original — now available as an e-book. In the grand tradition of science fiction narrative represented by the best of H.G. Wells and Jules Verne, Stanisław Lem describes the story of a space cruiser sent to an obscure planet to determine the fate of another ship whose communications with Earth have abruptly ceased. On Regis III, Navigator Rohan and the crew of the Invincible encounter the classic quandary: what course of action can man take once he has limits of his knowledge? The question of inexplicable, the bizarre, the problem that lies just beyond analytical reach are woven into a science-fiction plot that sustains excitement to the last.