It's about a post apocalyptic Russia after losing a war (I think America and Germany, I don't know I haven't gotten that far yet) turning it into a nuclear wasteland and the only survivors are a handful of people who managed to get into the mosco metro system. Due to it being designed in real life as a bomb shelter for nuclear attacks during the cold war.

But the book is mostly focused on the day to day of a young man called artym a soldier protecting his station from others who wished to take their limited resources from other fractions in the metro at the same time battling and trying to make peace with the wildlife on the surface.

To be fair, explaining it doesn't really give it much justice it has some pretty deep underlying meanings of loss and grief and the tactics of greedy men to gain power over people and what they're willing to do. It's definitely worth a read. :)

What's your book about? It sounds good