telling you about reading Time Travel, by James Gleick, which mentioned Flatland: A Romance in Many Dimensions, by Edwin Abbott, published in 1884. Abbott was dealing with the fourth dimension, and our difficulty getting our heads around that new idea, by imagining a two-dimensional land where the inhabitants are trying to get their minds around the possibility of a third dimension. (Plus, it satirizes Victorian culture.) Abbott's narrator is a square named A. Square.
OK, Sally goes on to perceive love in an altogether new way, thanks to Flatland, and I went on to seek out Flatland and Cosmos from the library! Oddly, I could only find the audiobook of Flatland, so that's a fun and unusual experience. When the narrator says, "In Figure 1, etc." I know there must be illustrations, but I can rather easily imagine them. I have not come yet to the potato, nor to "The Edge of Forever," but I have seen a still from the series in which Carl Sagan is holding an apple over a two-dimensional gameboard-like depiction of what might be Flatland, so...a pomme if not a pomme de terre. (Oh, my origami brain!) If I ever get there, to the Edge of Forever, and back, I'll let you know. But, for now, my destination is not even Flatland but Cleveland, via televisonland, and the World Series. May the best team win!