In the Days of the Comet (1906) is a science fiction novel by H. G. Wells.

In In the Days of the Comet humanity is "exalted" when a comet causes "the nitrogen of the air, the old azote," to "change out of itself" and become "a respirable gas, differing indeed from oxygen, but helping and sustaining its action, a bath of strength and healing for nerve and brain."

The result: "The great Change has come for evermore, happiness and beauty are our atmosphere, there is peace on earth and good will to all men."

Herbert George "H. G." Wells (1866-1946) was an English writer, now best known for his work in the science fiction genre. He was also a prolific writer in many other genres, including contemporary novels, history, politics and social commentary, even writing textbooks and rules for war games. 

Wells is one person sometimes called "The Father of Science Fiction", as are Jules Verne and Hugo Gernsback. His most notable science fiction works include The War of the Worlds, The Time Machine, The Invisible Man and The Island of Doctor Moreau.