1942. The North Atlantic. The war rages above—but in the crushing dark below, something older is waiting. HMS Dreadnought, a Royal Navy submarine on patrol, discovers a drifting tanker bleeding black oil into the sea. When the crew boards the derelict, they bring back more than a sample. The substance isn’t oil. It’s alive. At first it whispers. Then it infects. Soon the submarine’s steel corridors echo with hallucinations, body horror, and voices that are not human. As paranoia fractures the crew, the parasite spreads—through lungs, through pipes, through the very hull itself. Commander Alistair Hallowes must fight to hold his men together in a world without sky, where discipline and superstition clash in the dark. But the ocean has already chosen its choir. Beneath the Atlantic, an ancient intelligence stirs… and it does not intend to be forgotten. Claustrophobic, brutal, and deeply unsettling, Below the Black Tide is a World War II horror novel that plunges into the abyss where war, madness, and cosmic terror meet.