The Night Land

The Sun has gone out: the Earth is lit only by the glow of residual vulcanism. The last few millions of the human race are gathered together in a gigantic metal pyramid, the Last Redoubt, under siege from unknown forces and Powers outside in the dark. These are held back by a Circle of energy, known as the "air clog," powered from the Earth's internal energy. For millennia, vast living shapes - the Watchers - have waited in the darkness near the pyramid: it is thought they are waiting for the inevitable time when the Circle's power finally weakens and dies. Other living things have been seen in the darkness beyond, some of unknown origins, and others that may once have been human.
To leave the protection of the Circle means almost certain death, or worse, but as the story commences, the narrator establishes mind contact with an inhabitant of another, forgotten, Redoubt, and sets off into the darkness to find her.

William Hope Hodgson was an English author. He produced a large body of work, consisting of essays, short fiction, and novels, spanning several overlapping genres including horror, fantastic fiction, and science fiction.[2][3][4][5] Hodgson used his experiences at sea to lend authentic detail to his short horror stories, many of which are set on the ocean, including his series of linked tales forming the "Sargasso Sea Stories". His novels, such as The House on the Borderland (1908) and The Night Land (1912), feature more cosmic themes, but several of his novels also focus on horrors associated with the sea. Early in his writing career Hodgson dedicated effort to poetry, although few of his poems were published during his lifetime. He also attracted some notice as a photographer and achieved renown as a bodybuilder. He died in World War I at age 40.