The famous geometrical romance by schoolmaster and academic Edwin A. Abbott which mixes biting satire, wit, and an unparalled mathematical thought world. Original and thought-provoking, it has stretched and challenged generations of readers alike. Abbott was an Anglican priest, headmaster, and theologian. His fantasy combines every element of his understanding to produce a world difficult to match in its detail---both mathematical and moral. A true romance of geometry which probes geometry to its foundations and yet a satire which asks the reader to reconsider the assumptions of our own dimension, this masterpiece has found its place among the classics for good reason. This volume has been edited and formatted for ease of reading. It includes the original illustrations and preface to the second edition.