Published by Futura Publications in 1977, this was the third New Avengers
paperback. It was published in the USA by our good friends at Berkeley
Medallion in December, 1978. The story is based on the screenplay for the
TV episode, To Catch A Rat, which was written by Terence Feeley. There was
also a hardcover edition of this published in the UK.
From the back cover of the UK edition:
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.
TO CATCH A RAT
The third in a thrilling series of novels based on the TV series, THE NEW
AVENGERS, starring Patrick Macnee, Joanna Lumley and Gareth Hunt.
From the back cover of the US edition:
CODE NAME: WHITE RAT
SUBJECT: DOUBLE AGENT
TARGET: BRITISH INTELLIGENCE!
A BBC broadcast is interrupted by the ghostly
voice of an agent, presumed dead five years ago, with a most disturbing message:
there is a "deep double" agent at work in the highest level of
Her Majesty's intelligence elite! He has one more hit to make; but
two expert trouble-makers - John Steed and his lethal and beautiful partner,
Purdey - are out to see that he doesn't earn his East German pension!