Doppelganger

From Author Wars - https://authorwars.com/publications/doppelganger-10683.html

Overview:

Title: Doppelganger
Author: Eric Higgs
Year: 1987
ISBN-10: 0312001215
Publisher: St. Martin's Press
Price: $14.95
Pages: 229
Binding: Hardcover
Type: Novel
Title Reference: Doppelganger
Notes: Cover artist from back flap of archive.org copy; the front cover and title page say Eric Higgs but the copyright page says Eric C. Higgs.