Katherine Fennelly is an emeritus professor of public policy at the Humphrey School of Public Affairs of the University of Minnesota with a Ph.D. from Columbia University, where she was on the faculty in the School of Public Health early in her career. She is known for the breadth and quality of her social science research and for numerous academic publications. In this book, Fennelly applies her expertise to an investigation of the life of her maternal grandfather, a Hungarian immigrant who arrived in the US one hundred years ago and became the head of an elite espionage unit for the Allied Forces and an award-winning children’s book author. Her strategies involved conducting genealogical research, accessing personnel files from the CIA and reviewing hundreds of previously unpublished original documents at the National Archives. She read widely on each of the topics covered and corresponded with scholars of World War II, Jewish history, and the Holocaust. She also interviewed surviving family members about her grandfather’s life and accomplishments.