H. G. Wells 
First Men in the Moon [PDF ebook] 

‘My next clear recollection is that we were prisoners at we knew not what depth beneath the moon’s surface … At the village of Lympne, on the south coast of England, the ‘most uneventful place in the world’ the failed playwright Mr Bedford meets the brilliant inventor Mr Cavor, and together they invade the moon. Dreaming respectively of scientific renown and of mineral wealth, they fashion a sphere from the gravity-defying substance Cavorite and go where no human has gone before. They expect a dead world, but instead they find lunar plants that grow in a single day, giant moon-calves and the ant-like Selenites, the super-adapted inhabitants of the Moon’s utopian society. The First Men in the Moon is both an inspired and imaginative fantasy of space travel and alien life, and a satire of turn-of-the-century Britain and of utopian dreams of a wholly ordered and rational society.