An undercover mission beyond the Iron Curtain to recover a defected scientist goes disastrously wrong - a classic early Cold War thriller from the acclaimed master of action and suspense. Now reissued in a new cover style. Doctor Jennings, a noted scientist in possession of a precious secret, has gone over to the Soviet Union. It is Michael Reynolds' mission to get him back. To penetrate behind the Iron Curtain and reach his quarry will be difficult...