Front matter
Reading edition
Transcriber's Note and Errata
This e-text was produced from Astounding Science Fact and Fiction, July 1960. Extensive research did not uncover any evidence that the U. S. copyright on this publication was renewed.
The original page numbers from the magazine have been retained.
Illustrations have been moved to the appropriate places in the text.
A few typographical errors have been marked in the text. If the mouse hovers over the marked text, the explanation will appear.
There was one instance each of 'hyperspace' and 'hyper-space'. There was one instance of 'hook-up' and one of 'hookups'. These hyphenations were not changed.