Realm of Chaos

From Author Wars - https://authorwars.com/books/realm-of-chaos-2928165.html

Overview:

Title: Realm of Chaos
Author: Herbie Brennan
Year: 1986
Type: Novels
Series: Grail Quest (J. H. Brennan)
Number in Series: 6

Variant Titles:

1986. Realm of Chaos