Shield

From Author Wars - https://authorwars.com/publications/shield-257669.html

Overview:

Title: Shield
Author: Poul Anderson
Year: 1974
Publisher: Berkley Medallion
Price: C$0.95
Pages: 158
Binding: Paperback
Type: Novel
Title Reference: Shield
Notes:
Cover art credited on back cover, and also visibly signed. Catalog Number "N2673" on cover, SBN 425-02673-9 on copyright page which gives a bad checksum. Copyright page says "Berkley Medallion edition, October, 1974 / Third Printing" but the last page carries a printing date code of "9-74" "Printed in Canada"