If you like dark novels, I'll recommend a novel to you. It's Cataclysm. This was a sci-fi novel written by the author, Xin Mingfeng. It told the story of a biochemical virus invading the entire world, turning the earth into a world of blood and fire, and the continuous fall of human civilization. How should humans survive in the darkness? Read this novel. Perhaps it can give you some inspiration. I hope you like my recommendation.