Tunnel in the Sky

What was to have been a standard ten-day survival course had become an indefinite life-or-death nightmare. A group of young people were stranded somewhere in the universe, beyond contact with earth. They were being forced to forge a future where sometimes not even the fittest could survive.

Robert Anson Heinlein was an American science fiction writer. Often called "the dean of science fiction writers", he was one of the most popular, influential, and controversial authors of the genre. He set a high standard for science and engineering plausibility and helped to raise the genre's standards of literary quality. He was one of the first writers to break into mainstream, general magazine …