Protector

From Author Wars - https://authorwars.com/publications/protector-320564.html

Overview:

Title: Protector
Author: Larry Niven
Year: 1975
ISBN-10: 0860078485
Publisher: Futura
Price: £0.45
Pages: 218
Binding: Paperback
Type: Novel
Title Reference: Protector
Notes: Second printing as per copyright page ("Reprinted 1975").
Artist not credited.
Same cover art as on Best Science Fiction Stories of the Year (Ace 1973). Orbit logo and name on cover and spine.