The Tenth Planet

From Author Wars - https://authorwars.com/publications/the-tenth-planet-189609.html

Overview:

Title: The Tenth Planet
Author: Edmund Cooper
Year: 1973
ISBN-10: 0340175087
Publisher: Hodder & Stoughton
Price: £1.95
Pages: 192
Binding: Hardcover
Type: Novel
Title Reference: The Tenth Planet
Notes:
• "First printed 1973 on copyright page. Note: Both the Hodder and Stoughton and the US edition published by G.P. Putnam were issued the same month, the latter on November 20. Priority, if any, not established." - Currey • Clute/Nicholls and Reginald1 both have the Putnam edition as first