Second impression (fourth printing).
First printed 1976.
Reprinted 1977 (twice).
125 pages, plus 2 pages advertising other Doctor Who books and 1 page about Wyndham books.
Novelization of the 1973 serial by Terry Nation.
A Target Book.
Published by the paperback division of W. H. Allen & Co. Ltd.
A Howard & Wyndham Company.
A Target Book.
Published by the paperback division of W. H. Allen & Co. Ltd.
A Howard & Wyndham Company. (this comment is from another edition of this book)