Upvoted...and here's my summary, since it's not on the OP:
The adventures of a two-dimensional creature into the lands of the single-dimension and the three-dimension (and more). Also, on his efforts to evangelize his visions.
When I first read this over ten years ago, I was surprised to learn that the book itself had been published in the 19th century. It was my first true realization that people just as "smart" as us modern folk have existed for quite a while.
