A lovely read, if you are willing to suspend a little credibility. I have read many books in this genre both fact and fiction and know that the research must have been considerable and also the French used is CORRECT and idiomatic, which makes a refreshing change!
In fact, women WERE sent into France from here during World War 2 and excellent agents they made.
The ending was rather weak and could have been a little longer with a little more explanation - you have to read the epitaph and memorial at the end to find the eventual fate of Evelyn.
However, the book evoked the terror, unbelievable bravery and patriotism of the ordinary French citizen and the incredibly brave agents who went out there to help in the struggle against The Third Reich to a high degree.
All in all, a good read and I would recommend that anyone read it.