Julia Kelly's second Parisian Orphan mystery, Betrayal at Blackthorn Park, gives newly minted British spy Evelyne Redfern a chance to test her skills in the field, while giving readers a glimpse into the innovations and intrigue involved in winning World War II.
Kelly (A Traitor in Whitehall; The Last Garden in England) sets her narrative in the fall of 1940, just as Evelyne returns to London after completing spy "finishing school" in Hampshire and a test mission in Yorkshire. Evelyne is surprised to learn that her first field assignment will involve testing the security measures at Blackthorn Park, the titular manor house requisitioned by the Special Operations Executive (SOE) for the manufacture and testing of explosives. Prime Minister Winston Churchill is scheduled to visit Blackthorn soon for a weapons demonstration, and the estate has received reports of theft, which Evelyne is firmly told not to investigate.
With her handler, the aggravatingly handsome David Poole, Evelyne leaves London (and her best friend, Moira) behind for Sussex, where she poses as the cousin of a local woman and begins her assignment. Before she can complete her security tests, however, she finds Sir Nigel Balram, the head of engineering at Blackthorn, shot dead in his office. It looks at first glance like a suicide, but Evelyne and David aren't convinced--which means they must work together to both discover a motive and catch a killer before Churchill's visit, before things go (more) terribly wrong.
Told from Evelyne's sharp, observant viewpoint, Betrayal at Blackthorn Park delves into the politics of spycraft and the odd-but-true details of weapons invented during the war: boiled sweets used in timing devices, sugar plates fitted into bombs, and other innovative ideas. As Evelyne and David interview the scientists and other staff at Blackthorn (with the help of an eager young constable), they also uncover a nest of secrets and lies, professional and personal jealousies, clandestine affairs, competition between colleagues, and the strong opinions of the housemaid Jane. Class, education, gender, and ambition also play a role, giving multiple people motives for murder and sabotage. As Churchill's visit draws nearer, and other members of staff find themselves in danger, Evelyne must use not only her freshly developed spying skills but her considerable grit and chutzpah to catch the killer.
Tautly plotted, with layered historical detail and plenty of dry wit, Evelyne's second adventure is a satisfying mystery and a slice of (nearly) top-secret wartime history. --Katie Noah Gibson, blogger at Cakes, Tea and Dreams
Shelf Talker: Julia Kelly's second World War II mystery deftly mixes murder, sabotage, and clandestine weapons at an elegant Sussex manor house.