Retief Unbound

From Author Wars - https://authorwars.com/publications/retief-unbound-571492.html

Overview:

Title: Retief Unbound
Author: Keith Laumer
Year: Unknown
ISBN-10: 0441715060
Publisher: Ace Books
Price: $2.50
Pages: 343
Binding: Paperback
Type: Omnibus
Title Reference: Retief's Ransom
Notes:
• "First Ace Printing: May 1979"
• Fourth printing by number line 4 6 8 0 9 7 5
• "Cover art by Bob Adragna" on copyright page, the artwork is also signed
• OCLC has no record for the ISBN or printing