Flatland

Full text.
This masterpiece of science (and mathematical) fiction is a delightfully unique and highly entertaining satire.
A work that continues to pose provocative questions about perception and reality, Flatland is a brilliant parody of Victorian society where all existence is limited to length and breadth - its inhabitants unable even to imagine a third dimension. The amiable narrator, A Square, provides an overview of this fantastic world - its physics and metaphysics, its history, customs and religious beliefs. But when a strange visitor mysteriously appears and transports the incredulous Flatlander to the Land of Three Dimensions, his world view is forever shattered.
Written more than a century ago, Flatland conceals within its brilliant parody of Victorian society speculations about the universe that resonate in Einstein's theory of relativity as well as the current 'string-theory' of nature.