Diane Fanning Libros

May, 1944. Libby Clark is roused from sleep by a colleague in distress. Marvin's cousin Frannie has been charged with treason, and he hopes that Libby, a clear-headed scientist at a secret World War II facility in Oak Ridge, Tennessee, can find a way to help prove her innocence.

May, 1945. Their aim is to bring the war to a swift, decisive end. But Libby Clark is not the only one to have doubts about the horror she and her fellow scientists are labouring to unleash on the citizens of Japan. When a campaign of small acts of sabotage escalates into murder, Libby must turn undercover sleuth to unmask the traitor within.