From Paris with Love by Samantha Tonge
This is the sequel to Sam's highly successful Doubting Abbey, and features the same mad woman, Gemma and her aristocratic boyfriend Edward. They're working for a month in Paris, learning more about the restaurant industry, as the plan is to save Edward's ancestral home by setting up a cookery school in it.
Then Gemma gets recruited by MI6 to try to uncover a potential threat to the royal family...
It's a wacky plot, but a really fun read, and is highly recommended for a bit of escapism.