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It was just a test . . . But something had gone wrong. Terribly wrong. What was to have been a standard ten-day survival test had suddenly become an indefinite life-or-death nightmare. Now they were stranded somewhere in the universe, beyond contact with Earth . . . at the other end of a tunnel in the sky. This small group of young men and women, divested of all civilized luxuries and laws, were being forced to forge a future of their own . . . a strange future in a strange land where sometimes not even the fittest could survive! ". . . fascinating . . . ingenious . . . this a book in the grand tradition of high literature!" -- The New York Times *From the Paperback edition.* ** ### From the Publisher Like many people, I go way, way back with Heinlein. My very favorite book (and one that stands out in my mind--and with much affection--to this day) is Tunnel in the Sky. I really, really wanted to go off to explore new worlds with a covered wagon and horses, like the hero does at the very end of the book. But one of the nice things about Robert Heinlein is that he's got something for everyone. One of my best friends has a different favorite: Podkayne of Mars. Go figure.                         --Shelly Shapiro, Executive Editor ### From the Inside Flap It was just a test . . . But something had gone wrong. Terribly wrong. What was to have been a standard ten-day survival test had suddenly become an indefinite life-or-death nightmare. Now they were stranded somewhere in the universe, beyond contact with Earth . . . at the other end of a tunnel in the sky. This small group of young men and women, divested of all civilized luxuries and laws, were being forced to forge a future of their own . . . a strange future in a strange land where sometimes not even the fittest could survive! ". . . fascinating . . . ingenious . . . this a book in the grand tradition of high literature!" -- The New York Times *From the Paperback edition.*