The Big Sun of Mercury

From Author Wars - https://authorwars.com/publications/the-big-sun-of-mercury-359545.html

Overview:

Title: The Big Sun of Mercury
Author: Isaac Asimov
Year: 1980
ISBN-10: 0450046923
Publisher: New English Library
Price: £0.90
Pages: 143
Binding: Paperback
Type: Novel
Title Reference: The Big Sun of Mercury
Notes: First reprint of Feb 1979 NEL edition ("Reprinted June 1980").
Artist credited on back cover.
"The fourth Space Ranger novel" on front cover.