Book Notes

• This title may not be available as a stand-alone book. See the "Containing this Title" section to see which volumes it was published in.
• Revised version of novella first published in Astounding November 1944. This version first published in Aliens 4, Avon, 1959. (Source: Locus index).

Books Containing this Title

This title was published in the follow books. It can be rated independently of any volumes containing it.