D: Heavy Water

Set on the eve of World War II, the second book in Neal Stephenson's BOMB LIGHT series follows British journalist Owen Crisp-Upjohn as he is drawn into a high-stakes international mission to secure a vital substance for atomic weapon development. His journey takes him across Europe, from London to Norway, revealing complex characters and shifting loyalties amid a tense backdrop of espionage and global conflict. Rich with historical detail and emotional depth, the story explores themes of honor, love, and moral responsibility in a world teetering on the brink of catastrophe.