Peace Comes to Honeyfield by Anna Jacobs

Armistice Day, London, 1918. Fiercely independent Georgie is tired of being told what's best for her by men. When she defies her father's wishes by going out into the peace festivities, she tries to help a woman being attacked and encounters Patrick, a gallant, wounded ex-soldier looking for a new calling now that the fighting is done. But the war isn't over for everybody. Enemy forces have infiltrated the bureau and sent her father into hiding. And they are coming for her too. Georgie knows there's only one place where she'll be safe: Honeyfield. But there are traitors in the bureau and she doesn't know who she can trust.