Thundar: Man of Two Worlds

From Author Wars - https://authorwars.com/books/thundar-man-of-two-worlds-6245.html

Overview:

Title: Thundar: Man of Two Worlds
Author: S. J. Byrne
Year: 1971
Type: Novels

Variant Titles:

Resources:

dmrbooks.com - Thundar: Man of Two Worlds