Edwin Abbott Abbott was a man who lived a long time ago and wrote a book called "Flatland". The book is about a world called Flatland where everyone lives on a flat surface, like a piece of paper. In Flatland, there are different types of shapes, like squares, circles, and triangles, and they have different jobs and social statuses.
The story follows a square who lives in Flatland and learns about the existence of other dimensions, like a world above Flatland called Spaceland. The square has a hard time understanding this because he can only see in two dimensions (like looking at a picture). He also learns about a mysterious third dimension that he cannot see, but can only imagine.
Edwin Abbott Abbott wrote "Flatland" to help people understand what it's like to live in a world with only two dimensions and to think about what it would be like if there were other dimensions beyond what we can see. His book is still read and studied today because it teaches us about geometry, mathematics, and imagination.