This Darkening Universe

From Author Wars - https://authorwars.com/publications/this-darkening-universe-249459.html

Overview:

Title: This Darkening Universe
Author: Lloyd Biggle, Jr.
Year: 1975
ISBN-10: 0385086768
Publisher: Doubleday
Price: $5.95
Pages: 210
Binding: Hardcover
Type: Novel
Title Reference: This Darkening Universe
Notes:
- Stated "First Edition" on the bottom of the copyright page with no number line. The printing date is stated on the title page as "1975".
- My copy has gutter code Q4? on page 210. Page 210 is the last page in the publication and the gluing of the endpaper covered up the last digit of the gutter code. I peeled the endpaper away a little and there's a fragment of what appears to be a 5 or "Q45" which translates to a November 1975 manufacturing date. Prior to verification this ISFDB record reported the date as 1975-11-00. The source for this is unknown. Amazon reports "January 1, 1975" likely based on the 1975 on the title page. Locus does not have a record for this title. My copy was purchased/received in December 1975 and so 1975-11-00 seems reasonable. ~Marc Kupper
- Stated "Library of Congress Catalog Card Number 75-11070" and "Copyright © 1975 by Lloyd Biggle, Jr."
- The cover art credit is on the back jacket flap.