Description
The Invincible (Polish: Niezwyciężony) is a science fiction novel by Polish writer Stanisław Lem, published in 1964. The Invincible originally appeared as the title story in Lem's collection Niezwyciężony i inne opowiadania ("The Invincible and Other Stories").
An interstellar second-class cruiser called Invincible lands on Regis III, which seems bleakly uninhabited, to investigate the loss of the sister ship Condor.