Empire

From Author Wars - https://authorwars.com/publications/empire-282546.html

Overview:

Title: Empire
Author: H. Beam Piper
Year: Unknown
ISBN-10: 0441205577
Publisher: Ace Books
Price: $2.50
Pages: 242
Binding: Paperback
Type: Collection
Title Reference: Empire
Notes:
Third Ace printing as per the number line.
Cover art is uncredited.
"Terro-Human Future History Chronology" appears on unnumbered pages between contents and page 1. Cover art not credited and there is no identifiable signature on the cover.