Christine Kuehn reveals a hidden family secret in her book, “Family of Spies: A World War II Story of Nazi Espionage, Betrayal, and the Secret History Behind Pearl Harbor.” She uncovers that her grandfather, Otto, was a Nazi spy who relayed military information before the Pearl Harbor attack. The narrative explores her father’s guarded past and his estranged relationship with his first family, highlighting the complexities of their history. Kuehn’s discovery sheds light on the long-lasting effects of espionage on her family’s legacy.