A thought-provoking novel of a sentient spaceship's voyages, from the Hugo Award–winning author of Stand on Zanzibar . "One of the most important science fiction authors. Brunner held a mirror up to reflect our foibles because he wanted to save us from ourselves." —SF Site Among six hundred thousand stars visited by man, sixty thousand have planets hospitable to life, six thousand have developed life and six hundred have been settled, or seeded, with humanity. A vast vessel, known simply as Ship, travels an endless route, checking in with all the settled planets, observing, offering help where it can as some flourish, some falter but all change and evolve. Unexpectedly, Ship has developed feelings and intelligence and it struggles with human-like emotions as it sees the many ways that man can evolve or devolve when left to his own devices with the one eternal constant--change.