H. G. Wells 
The First Men in the Moon 

The First Men in the Moon is a classic science fiction novel written by H.G. Wells. It tells the story of a businessman named Bedford and a scientist named Cavor, who together build a spaceship and travel to the moon. There they encounter strange, insect-like creatures and a complex underground civilization ruled by the intelligent, yet brutal, Selenites. The novel explores themes of scientific discovery, human nature, imperialism, and the dangers of exploration and exploitation of other worlds.