- Published: 1968
- Hugo Award for Best Novel, 1969 —
- Nebula Award for Best Novel, 1969 —
In 2198 man lives precariously on hastily-established colony worlds and in seven giant starships. Mia Haveros ship tests its children by casting them out to live or die in a month of Trial in the hostile wilds of a colony world. Her trial is fast approaching and she must learn not only the skills that will keep her alive but the deeper courage to face herself and her world.