Note: First edition title page displays (7 lines, various fonts and sizes):   An Episode of Flatland:   or [very small caps]   How a Plane Folk Discovered   the Third Dimension.   to which is added [very small caps]   An Outline of the History   of Unæa. (viewed at HathiTrust)

Synopsis: "Hinton expressed a continuing interest in the two-dimensional speculations contained in Edwin A Abbott's Flatland (1885), and wrote a novel of his own set on a circular two-dimensional world, An Episode of Flatland: Or, How a Plane Folk Discovered the Third Dimension; To Which is Added An Outline of the History of Unæa (1907). Combining elements of the sentimental romance and the Fantastic Voyage, it conveys a sense of almost surreal constriction into its storyline, oddly predictive in tone of many twentieth-century Pocket Universe tales; the ultimate Conceptual Breakthrough – as the inhabitants of Flatland discover third-dimensional worlds, just in time to guide their own plane planet Astria away from another planet – is emotionally powerful." (underscore represents linked cross-reference) --SFE3: biographical entry by Brian M. Stableford and John Clute