The Incidental Spy: A WW2 Novella

Young Lena Bentheim is forced to flee Nazi Germany for Chicago in 1935, leaving her family and boyfriend behind. After learning English, she eventually finds a new life as a secretary in the Physics Department of the University of Chicago. She meets and 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.
A novella set in the early years of the Manhattan Project, The Incidental Spy is another fascinating historical thriller by Libby Fischer Hellmann, also the author of the highly acclaimed stand-alone thrillers Set the Night on Fire, A Bitter Veil, and Havana Lost.