Wikipedia page about this book: https://en.wikipedia.org/wiki/Flatland

Release date is 1995-01-01

"Flatland: A Romance of Many Dimensions" by Edwin Abbott Abbott is a satirical novella published in 1884. Set in a two-dimensional world inhabited by geometric shapes, the story follows a Square who encounters beings from other dimensions. Through his journey from Flatland to higher and lower dimensional worlds, the novella explores both the mathematical concept of dimensions and critiques Victorian society's rigid class and gender hierarchies. Unable to convince others of what he's witnessed, the Square faces imprisonment for preaching forbidden truths about reality beyond two dimensions. (This is an automatically generated summary.)

Original publication data not identified