As on a Darkling Plain

From Author Wars - https://authorwars.com/publications/as-on-a-darkling-plain-216501.html

Overview:

Title: As on a Darkling Plain
Author: Ben Bova
Year: 1978
ISBN-10: 0440132118
Publisher: Dell
Price: $1.75
Pages: 189
Binding: Paperback
Type: Novel
Title Reference: As on a Darkling Plain
Notes:
"First printing—August 1978"; no number line The artist is not credited, Kresek is on the artwork Printed in the US