Young Lena Bentheim is forced to flee Nazi Germany for Chicago in 1935, leaving her family and boyfriend behind. Eventually she finds a new life as a secretary in the Physics Department of the U. of Chicago. She marries another German refugee scientist and has a child. Then tragedy strikes, and Lena is forced to spy on the nuclear fission experiments at the U of Chicago. Set in the early years of the Manhattan Project, Spy is another fascinating historical thriller by Libby Fischer Hellmann.