Title: Protector
Series: Known Space
Number in Series: n/a
Author(s): Larry Niven
Cover Artist: Dean Ellis
Language: English
Original Publisher: Ballantine Books
Originally Published: September 1973
Publisher: Ballantine Books
Published: March 1974
ISBN-10: 0345234863
ISBN-13: 9780345234865
Catalog Number: 23486
Notes: Third printing.