D

In the second installment of Neal Stephenson's Bomb Light series, D: Heavy Water, set in 1934 Europe on the brink of World War II, British journalist Owen Crisp-Upjohn is drawn into a high-stakes quest for deuterium—an essential component for atomic weapons. Tasked with espionage in Moscow, he encounters the enigmatic Earl of Suffolk and a mysterious woman with ties to Soviet intelligence. As they race against time to secure this vital resource before the Nazis can exploit it, Owen’s journey evolves from mere observer to a man grappling with the heavy burden of choice, honor, and the perilous landscape of shifting allegiances. With a backdrop rich in historical context and urgency, the narrative explores how unseen decisions can shape the fate of humanity.