Nuclear fission reshaped the modern world, but the scientist who explained it was written out of its highest honors. Lise Meitner provided the theoretical explanation that unlocked atomic energy, transforming physics and history alike. Yet her role was overshadowed, her recognition withheld, and her moral clarity ignored in an era defined by power and war. The Quiet Force of Fission explores Meitner's life as a physicist, exile, and conscience of science. It examines her partnership with Otto Hahn, her escape from Nazi Germany, and her refusal to celebrate the weaponization of her work. This is a story about intellectual courage, ethical responsibility, and how history often rewards results while neglecting understanding. For readers who want the full story behind nuclear science, its promise, its danger, and its forgotten architect, this book restores Lise Meitner to her rightful place.