D: Heavy Water

Set on the eve of World War II, "D: Heavy Water" is a suspenseful novel by Neal Stephenson that follows British journalist Owen Crisp-Upjohn as he's drawn into international espionage in pursuit of a crucial substance for atomic weaponry. His journey takes him across Europe, from London to Norway, as he navigates a web of science, deception, and shifting loyalties. With richly drawn characters and a tense political climate, the story explores the high-stakes race to control heavy water and the moral dilemmas faced along the way.