This Darkening Universe

From Author Wars - https://authorwars.com/publications/this-darkening-universe-1035941.html

Overview:

Title: This Darkening Universe
Author: Lloyd Biggle, Jr.
Year: Unknown
ISBN-10: 0385086768
Publisher: Doubleday
Price: $5.95
Pages: 210
Binding: Hardcover
Type: Novel
Title Reference: This Darkening Universe
Notes: Info from Archive.org copy. No "First Edition" statement on copyright page. Gutter code on p. 210 is cut off; a sliver of it can be seen on the lower right side.