Earth Giant

From Author Wars - https://authorwars.com/publications/earth-giant-423304.html

Overview:

Title: Earth Giant
Author: Edison Marshall
Year: 1961
Publisher: Popular Library
Price: $0.75
Pages: 380
Binding: Paperback
Type: Novel
Title Reference: Earth Giant
Notes: New edition. First printing. The 'Zuckerberg' signature is visible on the cover beside Heracles' left ankle. "Published in October, 1961" on copyright page of Archive.org copy.