Fathom Five
Robert Westall
Hardcover
(MACMILAN, March 24, 1979)
Is there really a spy in Garmouth? Too many Allied ships have been sunk by German U-boats, and why else would there be a radio transmitter floating down the river? Jack's search for the spy begins almost as a game. The author also wrote "Rachel and the Angel", "The Wind Eye" and "Yaxley's Cat".