Maria Alves works wonders with microfilm at the New York Public Library when the war breaks out. She speaks Portuguese and thanks to her pluck manages to gain acceptance microfilming Axis publications in neutral Lisbon. She is told that she most definitely will not be a spy. If you've read the title, you know very well that this is not true.
In Lisbon, she falls in love with a bookstore owner, who supplies her with all the German books and magazines she can handle, but even so she becomes involved with a Swiss banker who works for the Germans. Soon she finds herself a double agent, spying on the Germans while supposedly spying on the British. She provides misinformation about the location of the D-Day invasion and even seriously contemplates trying to assassinate Hitler at a wedding she attends. Talk about pluck.
The novel seems a bit amateurish (not as good as Hlad's The Long Flight Home), but it should please many readers, especially girls in their early teens and old ladies.