After the success of A TRAITOR IN WHITEHALL, Kelly brings back typist Evelyne Redfern who has just returned from ‘spy’ school and is anxious for a real field agent case.

She’s decidedly unhappy that her first foray is an assignment to do what seems an easy security test at a manor house requisitioned for the war in rural Sussex, one expecting a visit in a few days from none other than Winston Churchill. Her handler, David Poole, equally frustrates her and amuses her, but Blackthorn Park is the site of a secret munitions facility and they agree to the mission.

She’s learning the lay of the land when she discovers one the chief engineer murdered in his office, and she and David quickly become conscripted into a murder investigation, hampered not only by the reticence of the staff, who have all been cautioned to be secretive about their work, and also by the layers of deception at hand that have far reaching effects.

Kelly’s historical details are spot on, as is the dicey relationship between Evelyne and David, who make a good detecting couple even as they dance around each other as Evelyne proves herself his equal. There are many aspects to their investigation, from the actual munitions being made to the personal relationships hidden amongst the staff that all play into the plot.

And it’s all under the time threat of the impending visit from Churchill.

Highly readable and well-plotted with a nice dose of feminism to boot.