Bill, the Galactic Hero

From Author Wars - https://authorwars.com/publications/bill-the-galactic-hero-268953.html

Overview:

Title: Bill, the Galactic Hero
Author: Harry Harrison
Year: Unknown
ISBN-10: 0380003953
Publisher: Avon
Price: $3.95
Pages: 185
Binding: Paperback
Type: Novel
Title Reference: Bill, the Galactic Hero
Notes: 6th printing of November 1979 mass market paperback, according to number-line. Price and blurb at back suggest it's around 1989 when the Robot Slaves sequel came out.