The Gaunt Woman

This is a very nice novel by Edmund Gilligan. It was the basis for the screenplay of the movie Sealed Cargo (1951), which is how I became familiar with it. I recommend it highly. It concerns the captain of a sailing vessel who is involved in the identification and destruction of a German submarine tender during World War II. The tender was disguised as a Danish sailing vessel. Mystery, danger, even a touch of romance. Well worth the read.