The Hostage of Zir

From Author Wars - https://authorwars.com/publications/the-hostage-of-zir-41689.html

Overview:

Title: The Hostage of Zir
Author: L. Sprague de Camp
Year: 1982
ISBN-10: 0441342965
Publisher: Ace Books
Price: $2.50
Pages: 210
Binding: Paperback
Type: Novel
Title Reference: The Hostage of Zir
Notes:
- "First Ace Printing: November 1982"; no number line
- The artist is not credited, no visible signature; style is consistent with the other four books in the series, all signed by Alexander