The Black Lake

Two veteran cavers descend into one of Europe's deepest unexplored cave systems—but one of them is hiding a secret that could kill them both. Karl Vinson and Tom Shepherd have spent fifteen years pushing the limits of underground exploration together. When a catastrophic collapse seals their only exit in the depths of a Montenegrin abyss, their survival depends on trust, grit, and a terrifying swim through flooded darkness. What waits beyond the black lake will test everything they thought they knew about courage—and each other.