Fourth printing.
First printed in 1976.
Reprinted 1976 (twice) and 1978.
127 pages, plus 1 page, coupon for information, free Target badge and Target prize draw.
Cover by Chris Achilleos.
Novelization of the 1975 serial Terror of the Zygons written by Robert Banks Stewart.
A Target Book.
Published by the paperback division of W. H. Allen & Co. Ltd.
A Howard & Wyndham Company.