This novel is set in a post-apocalyptic world. A world virtually destroyed after the impact of an asteroid which released alien spores that mutate everything they touch, to the point of creating horrid 'blights' that infect great swathes of land. There were 144 bunkers where the best remnants of humanity attempted to survive, but one by one those bunkers either fell strangely silent or were destroyed by wastelanders. I found the concept behind the story most interesting,
Major Spoiler follows:
Unfortunately, the novel lost credibility when the inhabitants of bunker 108 took a human with purple pus coming out of his wounds into the bunker. Bear in mind that there used to be 144 bunkers, now only a few left. The inhabitants of bunker 108 knew that most of the bunkers had disappeared without even giving off a warning. Yet bunker 108 still willing took this infected human into the bunker, with almost no quarantine procedures put in place. These bunker inhabitants should have been fanatical about quarantine. Yet those exposed to the man were not scrubbed down. And when the man died and began mutating into something else, four staff stood there, with zero protection, and watched him. And of course they became infected, and then walked out of that room and infected the whole base.
Apart from that the story was fairly straight forward and predictable.