Orc's Opal

From Author Wars - https://authorwars.com/publications/orcs-opal-397363.html

Overview:

Title: Orc's Opal
Author: Piers Anthony, Robert E. Margroff
Year: Unknown
ISBN-10: 0812511778
Publisher: Tor
Price: $4.99
Pages: 316
Binding: Paperback
Type: Novel
Title Reference: Orc's Opal
Notes: Second printing based on number sequence on copyright page.
Cover image same as for first edition except bottom is trimmed to 4mm (3/16") of the line "Adventures of Kelvin of Rud!"