The 10th Victim

From Author Wars - https://authorwars.com/publications/the-10th-victim-254518.html

Overview:

Title: The 10th Victim
Author: Robert Sheckley
Year: 1979
ISBN-10: 0441801765
Publisher: Ace Books
Price: $1.75
Pages: 151
Binding: Paperback
Type: Novel
Title Reference: The 10th Victim
Notes:
- "First printing: December 1965"
- "First Ace printing: January 1979" on the copyright page, no number line.
- Cover, spine and title page give the title in the same design, which may indicate it being the designer's choice of a title and not the author's. The running header on the odd pages gives the title as "The Tenth Victim"
- Both Reginald and Clute ignore the 'Variant' title
- Cover art is not credited, but there is a visible signature ("W. Siudmak") on some copies, cropped off on others.