The Tenth Planet

From Author Wars - https://authorwars.com/publications/the-tenth-planet-164151.html

Overview:

Title: The Tenth Planet
Author: Brett Sterling
Year: 1969
Publisher: Popular Library
Price: $0.60
Pages: 128
Binding: Paperback
Type: Novel
Title Reference: The Tenth Planet
Notes:
• The year of copyright is 1944. • Publication date from http://members.cox.net/pulpreprintindex/captainfuture.html. • The artist is not credited, no visible signature; the artist was determined by the parent title. • The artwork was obviously inspired by the one for The Door Into Summer by Paul Lehr. • Printed in the USA. • OCLC, along with Reginald/Clute, has the actual author as Joseph Samachson.