Used paperback in good condition. Cover and pages show minimal wear. Rubber price stamp on flyleaf. 160 pages. Published by Futura Books, 1977. ISBN 0860074749.

The White Rat: a traitor hidden somewhere in the highest echelons of British Intelligence, prepared to send colleague after colleague to a terrible death in the Soviet Union, until his last victim, a man who did not die but, after years in a mental home, recovered enough to enlist some formidable allies and set out on a mission of vengeance.

The New Avengers: John Steed, Mike Gambit, and their lethal, beautiful assistant, Purdey, promised that whatever the cost they would help to identify, find and destroy the traitor known only as the White Rat.