Gulliver's Travels, by Jonathan Swift. Part IV.

Gulliver's Travels (1726, amended 1735), officially Travels into Several Remote Nations of the World, is a novel by Jonathan Swift that is both a satire on human nature and a parody of the "travelers' tales" literary sub-genre. It is widely considered Swift's magnum opus and is his most celebrated work, as well as one of the indisputable classics of English literature. (From Wikipedia.)