Flatland: A romance of many dimensions, a classic 19th century short story by Edwin Abbott Abbott, is a famous text popular among mathematics and computer science students, and is considered useful reading for people studying topics in which the concept of other dimensions is important.
The story posits a world that exists only in two dimensions, and our narrator, a humble square, guides us through some of the implications of that. He is visited by a three-dimensional sphere, which he cannot comprehend until he sees the third dimension for himself. The role of women is explained, along with a class system, both of which are a satire of Victorian society at the time.
Numerous companions to Flatland have been written by various authors.
The text is now in the public domain.