Chemist Libby Clark is as smart as they come. Maybe even too smart for her own good. With World War II underway, she should focus on her research for the US military, not on solving crimes. But when her friend Marvin asks for help, she can't turn him away. Especially when she learns a traitor lurks within the walls of America's most secure facility -- the Secret City. Marvin's cousin Frannie has been accused of treason after letting one of the scientists use her switchboard -- and exposing him is the only way to clear her name. Libby discovers plenty of dirt on Dr. Hansrote, but nothing strong enough to take the physicist down. Then one of the scientists is murdered. If Libby doesn't unveil the spy in their midst soon, she could be the next victim of a killer clever enough to outwit them all.
