Interworld

From Author Wars - https://authorwars.com/publications/interworld-100221.html

Overview:

Title: Interworld
Author: Isidore Haiblum
Year: 1977
ISBN-10: 0440122856
Publisher: Dell
Price: C$1.50
Pages: 256
Binding: Paperback
Type: Novel
Title Reference: Interworld
Notes:
• "First printing: April 1977"; no number line
• A portion of this work first appeared in Swank Magazine.
• The artist is not credited, Kresek is on the cover
• Cover printed in the US, book in Canada