Kate Cartwright can see ghosts…though it's not a skill she publicizes in her wartime work for Britain's Secret Intelligence Service. But her ability comes in handy when she and an inscrutable Irish operative are dispatched to the Highmounts' country house party. Desperate to contact their two sons recently killed in the Great War, the Highmounts propose a séance—unleashing deadly revelations from both the supernatural and human worlds. Part ghost story, part old-school whodunit, this atmospheric mystery is a delightfully gripping read.