Herbert George Wells 
The First Men in the Moon [EPUB ebook] 

Another H.G. Wells classic sci fi. The novel tells the story of a journey to the moon by the impecunious businessman Mr. Bedford and the brilliant but eccentric scientist Dr. Cavor. Bedford bankrupt businessman who is making a comeback by writing a play, through a series of circumstances, teams up with Professor Cavor a recluse scientist who does not realize his own potential. Together they build a contraption, sphere, that can cut off gravity waves. Once on the moon Bedford and Cavor find that they are not alone. After a few adventures they are detained by the Moonies referred to mostly in this story as Selenites. Will they be able to make it back to Earth and warn the people of the strange creatures? Or will they be caught and who knows what may happen to them in the long run. The novel can also be read as a critique of prevailing political opinions from the turn of the century, particularly of imperialism.