Third printing.
172 pages plus 3 pages advertising other Target books including Doctor Who's and 1 page, coupon for information, free badge and prize draw.
Cover by Chris Achilleos. interior artwork by Alan Willow.
Novelization of the 1971 serial written by Barry Letts and Robert Sloman as by Guy Leopold.
Published by Tandem Publishing Ltd.
A Howard & Wyndham Company.