On Her Majesty's Frightfully Secret Service by Rhys Bowen

Georgiana's love has gone away on another secret assignment and she plans to go visit Italy and be with her girlfriend who is having a baby.  She calls in to see the Queen first because she's part of the Royal Family and she wishes to give up her right to be queen to she can marry Darcy.  She needs parliament permission and the Queen is going to ask for that.  As soon as she assures the Queen she really truly loves Darcy, the Queen is content and will ask.  However, when she finds Georgiana is on her way to Italy, she gives her an assignment.

Berkley and Net Galley allowed me to read this book for review (thank you).  It will be published August 1st.

The Queen wants her to go to a house party.  Her son and that dreadful Mrs. Simpson will be there.  She's afraid they are going to try for a secret marriage and she wants to stop it.  Georgiana doesn't know how she would stop it, but she would go and see what she could find out.

What she finds out is that there's more than one spy in the house.  There's also political pressuring going on trying to make the prince side with the Germans.  Even worse, her mother is there, too, and she has incriminating pictures she wants to find to stop blackmail.  With so many irons in the fire, it makes even being in the vicinity dangerous.  Then she finds out Darcy, her love, is playing a gardener here.  She can't talk to him but they meet secretly.

Then people start dying...  Her mother is accused of the murder.  They are dealing with a local policeman who wants to end the case quickly.  He won't let anyone leave the house.  The tension builds quickly...

Set in a time when Mussolini and Hitler were still alive, the story moves along a bit slowly but picks up as more shenanigans go on. Everybody has secrets.  But the killer is caught at the end.  I hope Darcy and Georgiana marry soon.