Fifth printing.
First printed 1978.
Reprinted 1979, 80, 82 (twice).
125 pages, plus 2 pages advertising other Doctor Who books and 1 page about Star books.
Cover by Roy Knipe.
Novelization of the 1974 serial by Terry Nation.
A Target Book.
Published by the paperback division of W. H. Allen & Co. Ltd.
A Howard & Wyndham Company.