A World of Difference

From Author Wars - https://authorwars.com/publications/a-world-of-difference-586760.html

Overview:

Title: A World of Difference
Author: Harry Turtledove
Year: 1990
ISBN-10: 0345360761
Publisher: Del Rey / Ballantine
Price: C$6.95
Pages: 308
Binding: Paperback
Type: Novel
Title Reference: A World of Difference
Notes:
• "First Edition: May 1990" • Printing not stated, no number line • The artist is not credited, no visible signature on the artwork • $4.95 in the US • Cover printed in the US, book in Canada.