Brunner wrote several novels concerning the "Zarathustra Refugee Planets," worlds beyond the fringe of galactic humanity, settled by ships in wild flight from a nova, and lost from sight for centuries.Here we go back to the catastrophe itself, and follow the fates of one such landing. Two ships make it to a nameless planet, and with nowhere else to go, it is learn to survive, or perish.Harsh winters, torrid summers, vicious carnivorous beasts, all of these are nothing compared to the danger posed by enmity between the complements of the two ships for each other!A previous version of this novel was published by Ace as *Castaways' World*. This is the First printing of this revised edition.