The Mistaken Wife - Number 3 in series

Autumn, 1797. With Napoleon's forces sweeping through Europe, a young English woman travels to Paris, risking her life on a secret mission that may buy Britain vital time... Mary Finch is no stranger to adventure, but even she hesitates before accepting her new assignment, travelling as the wife of an American artist into the very heart of enemy territory. The plan is so secret she can't even tell Captain Holland, with whom she is supposed to have 'an understanding'.
After a terrifying journey through revolutionary France she arrives in Paris only to discover that her American 'husband' is not quite what he appears. With the French chasing a deadly new weapon and an old nemesis threatening to unmask her as a spy, Mary soon finds herself in mortal danger... Thrilling and deeply satisfying, The Mistaken Wife is a spirited and gripping historical mystery from the author of the acclaimed The Blackstone Key.