First published	1950
Publisher	Greenberg
Format	Hardcover
Type	Novel
Pages	217

Notes

• No statement of printing on copyright page.
• Cover artist not credited and there is no visible signature.
• Binding is blue cloth with large metallic silver spot and smaller metallic purple spot on cover.
• Printing on spine is black (title), metallic purple (author) and metallic silver (publisher).
• PV2 has metallic copper spot on front, and a metallic gold author name on spine (instead of metallic purple.)
• Issued with post-paid publisher's response card.

"A Corwin Book" on front flap and title page; "Other Corwin Science-Fiction Books" on back cover.