The History of the Runestaff

From Author Wars - https://authorwars.com/publications/the-history-of-the-runestaff-506961.html

Overview:

Title: The History of the Runestaff
Author: Michael Moorcock
Year: 1979
Publisher: Book Club Associates
Pages: 573
Binding: Hardcover
Type: Omnibus
Title Reference: The Jewel in the Skull
Notes: Book club edition: no price, no ISBN
Cover artist Bob Haberfield credited on inner back flap as 'Bob Habberfield'