""An Episode of Flatland or How a Plain Folk Discovered the Third Dimension: To Which Is Added an Outline of the History of Unaea"" is a book written by Charles Howard Hinton and first published in 1907. The book is a work of science fiction and tells the story of a two-dimensional character named A. Square, who lives in a world called Flatland. A. Square is visited by a three-dimensional being, who introduces him to the concept of the third dimension and takes him on a journey through it. The book explores the idea of different dimensions and the limitations of perception. It also touches on social and political issues of the time, such as the treatment of women and the class system. In addition to the story, the book includes an outline of the history of Unaea, a fictional land that Hinton created. Unaea is a utopian society that has achieved a state of perfect harmony and balance between its inhabitants and the natural world. Overall, ""An Episode of Flatland or How a Plain Folk Discovered the Third Dimension: To Which Is Added an Outline of the History of Unaea"" is a thought-provoking work of science fiction that explores complex ideas in an accessible and engaging way.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.