It basically has everything I like - a dystopian, apocalyptic future, survival horror, the Mad Max of the underground.
Metro 2034 (The sequel to Metro 2033)
by Dmitry Glukhovsky
Overview
The long-awaited sequel to the cult bestseller Metro 2033, the second volume in the Metro trilogy, Metro 2034 continues the story of survival and struggle that unfolds in the mazes of the Moscow subway after WWIII.
As the entire civilization was wiped out by atomic bombs and the surface of the planet is polluted with neclear fallout, the only place suitable for men to live are shelters and bunkers, the largest of which is the subway system of Moscow, aka the Metro.
The Metro Series is set following a nuclear war in the early 21st century. The remnants of humanity now live underground in the Moscow subway system. Like the city-states of ancient Greece, individual stations govern themselves sometimes banding together to form small nations. Their ideologies vary from adherence to the Koran to fascism to nonspecific mysticism to communism. They war among each other, and with the mutant beings which have risen from ashes of the old world.
Metro 2034 takes place roughly a year after the events of Metro 2033. For better or worse, the “threat” of the dark ones has been eliminated. Those who remain must live with the decisions they made and that is not necessarily easy to do.
There's no hope for humans to return to the surface of Earth, to repopulate the forsaken cities, and to become once again the masters of the world they used to be. So they rebuild a strange and grotesque civilization in the tunnels and at the stations of the subway. Stations become city-states that wage trade and war on each other. A fragile equilibrium is established.
And then all can be ruined in matter of days. A new horrible threat looms that can eradicate the remains of humanity and end our era. It would take three unlikely heroes to face this menace.
The basis of two bestselling computer games Metro 2033 and Metro Last Light, the Metro books have put Dmitry Glukhovsky in the vanguard of Russian speculative fiction.
Metro 2034 tells a previously unknown part of the greater Metro saga that some only know from video games. Featuring blistering action, vivid and tough characters, claustrophobic tension and dark satire the Metro books have become bestsellers across the world.
https://www.barnesandnoble.com/w/metro-2034-dmitry-glukhovsky/1118588634
https://horrornovelreviews.com/2016/01/11/dmitry-glukhovsky-metro-2034-review/