"A novel of science, love, espionage, beautiful writing, and a heroine who carves a strong path in the world of men. As far as I'm concerned there is nothing left to want."—Ann Patchett, author The Dutch House"A highly-charged love story that reveals the dangerous energy at the heart of every real connection...Riveting."—Delia Owens, author of Where the Crawdads SingLove. Desire. Betrayal. Her choice could save a nation.Chicago, 1950. Rosalind Porter has always defied expectations—in her work as a physicist on the Manhattan Project and in her passionate love affair with colleague Thomas Weaver. Five years after the end of both, her guilt over the bomb and her heartbreak over Weaver are intertwined. She desperately misses her work in the lab, yet has almost resigned herself to a more conventional life.Then Weaver gets back in touch—and so does the FBI. Special Agent Charlie Szydlo wants Roz to spy on Weaver, whom the FBI...