Blindmen

Metro 2033: Blindmen is the debut novel by Dmitri Yermakov, written as part of the Metro 2033 universe. Released in November 2013, this is the forty-second book of the series.

synopsis
The action of the novel takes place in New Athos, at the two stations of the New Athos Underground Railroad and in a cave system from which people cannot escape as a result of the Shoah. Their main task was to survive with no light and very little food. However, a cosmonaut, Hermann Lykov, who has lost his memory, has managed to get into this abode. He and the other inhabitants of the caves have to go through various trials.

Interesting facts
Слепцы
 * The novel grew out of the short story "Strangers Don't Walk Here".
 * There really is a metro in New Athos. A mini-metro.
 * The first novel where the main protagonist loses his memory.
 * The first novel to touch on the theme of space.