H. G. Wells 
First Men in the Moon 

The First Men in the Moon is a scientific romance by the English author H. G. Wells, originally serialised in The Strand Magazine from December 1900 to August 1901 and published in hardcover in 1901, who called it one of his "fantastic stories". The novel tells the story of a journey to the Moon undertaken by the two protagonists, a businessman narrator, Mr. Bedford, and an eccentric scientist, Mr. Cavor. Bedford and Cavor discover that the Moon is inhabited by a sophisticated extraterrestrial civilisation of insect-like creatures they call "Selenites".