Flatland

Original text (free) [here]. Second and Revised Edition, 1884.

Flatland the movie (2007) [here]

More info: wikipedia

A flatland documentary (1965) [DVD here]

Professor Michele Emmer has also made a short movie about flatland in 1982: here

And there are a lot of interesting short videos about flatland:
- Ode to flatland
- Flatland : the limit of our consciousness
- Flatland: Assassination
- Flatland: reflections
- Flatland: Life of a square
- and this, which is more a nice visual commentary to the book

And this is a terrific way to visualize how a square will see in 2D: here!