Flatland : A Romance of Many Dimensions/Sphereland : A Fantasy About Curved Spaces and an Expanding Universe/2 Books in 1 Volume
Harpercollins, January 1994. Trade Paperback. Very good in wrappers (paperback). A century-old classic of British letters that charmed and fascinated generations of readers with its witty satire of Victorian society and its unique insights, by analogy, into the fourth dimension.